Live Help Chat

Aquarium additives and supplements are necessary for the survival of the animals in a saltwater or freshwater tank. Aquarium supplements make it possible for an aquarist to keep aquarium water parameters within the correct ranges, thereby increasing health and vigor.
Many of these additives are important for the well being of you aquarium inhabitants. Some of the basics for reef tanks include Calcium and Alkalinity, magnesium and Iodine. Many additives and supplements may be used to establish water parameters conducive to the husbandry of freshwater fishes, plants, and invertebrates in aquarium filled with purified water, to replenish depleted elemental concentrations in aquarium that rarely receive a water change, and to re-establish beneficial mineral concentrations in aquarium following large water changes.

At AquaCave, we offer some of the best selection and best prices on aquarium additives and supplements for you marine, reef and freshwater aquarium.

  • Brightwell Aquatics NeoNitro, 2 Liters / 67.6 oz.

    Brightwell Aquatics

    Brightwell Aquatics NeoNitro, 2 Liters / 67.6 oz.

    Brightwell Aquatics NeoNitro, Balanced Nitrogen Source for Nitrogen-Limited, Low-Nutrient Reef Aquaria Used in conjunction with MICROBACTER7 and REEF BIOFUEL or KATALYST, enables natural phosphorus uptake to take place in systems with inadequate...

    $32.95
  • Brightwell Aquatics NeoPhos, 2 Liters / 67.6 oz.

    Brightwell Aquatics

    Brightwell Aquatics NeoPhos, 2 Liters / 67.6 oz.

    Brightwell Aquatics NeoPhos, 2 Liters / 67.6 oz. Overview Used in conjunction with MICROBACTER7 and REEF BIOFUEL or KATALYST, enables natural nitrogen uptake to take place in systems with inadequate phosphorus content, lowering ammonia, nitrite,...

    $32.95
  • Tropic Marin BIO-Calcium ACTIF, 64 oz. Tropic Marin BIO-Calcium ACTIF, 64 oz.

    Tropic Marin

    Tropic Marin BIO-Calcium ACTIF, 64 oz.

    Tropic Marin BIO-Calcium ACTIF, 64 oz. Single Component Additive Supplies Calcium & Alkalinity Does Not Disrupt Ionic Balances Contains All Trace Elements No Dissolving Required No Unwanted Phosphates or Other Pollutants Calcium is one of...

    $32.42
  • Tropic Marin BIO-CALCIUM, 64 oz. Tropic Marin BIO-CALCIUM, 64 oz.

    Tropic Marin

    Tropic Marin BIO-CALCIUM, 64 oz.

    Tropic Marin BIO-CALCIUM, 64 oz. Tropic Marin Bio-Calcium Enables the addition of biologically ideal calcium to the reef aquarium:All calcareous animals, especially corals need calcium and carbonates to grow and flourish. However the growth rate of...

    $32.42
  • Triton Flourine Supplement, 1000ml Triton Flourine Supplement, 1000ml

    Triton

    Triton Flourine Supplement, 1000ml

    Triton Flourine Supplement, 1000ml The Triton System is based on accurate ICP-OES Testing that tells you exactly how much of any element may be in your aquarium allowing you to keep a healthy, sustainable reef ecosystem. Triton's testing and dosing...

    Was: $38.00
    Now: $32.30
  •  Red Sea Reef Foundation A Dry (Ca/Sr) - 1kg   Red Sea Reef Foundation A Dry (Ca/Sr) - 1kg

    Red Sea

    Red Sea Reef Foundation A Dry (Ca/Sr) - 1kg

    Red Sea Reef Foundation A Dry (Ca/Sr) - 1kg Calcium, Magnesium, Strontium, and Carbonate are the basic foundation elements or coral skeletons. All of these elements need to be available in balanced proportions for coral health and growth. Reef...

    $31.99
  •  Red Sea Reef Foundation C Dry (Mg) - 1kg  Red Sea Reef Foundation C Dry (Mg) - 1kg

    Red Sea

    Red Sea Reef Foundation C Dry (Mg) - 1kg

    Red Sea Reef Foundation C Dry (Mg) - 1kg Calcium, Magnesium, Strontium, and Carbonate are the basic foundation elements or coral skeletons. All of these elements need to be available in balanced proportions for coral health and growth. Reef...

    $31.99
  • Red Sea Reef Foundation B Dry (Alk) - 1kg Red Sea Reef Foundation B Dry (Alk) - 1kg

    Red Sea

    Red Sea Reef Foundation B Dry (Alk) - 1kg

    Red Sea Reef Foundation B Dry (Alk) - 1kg Calcium, Magnesium, Strontium, and Carbonate are the basic foundation elements or coral skeletons. All of these elements need to be available in balanced proportions for coral health and growth. Reef...

    $31.99
  • Brightwell Aquatics AngeLixir Food Soak, 125 ml./ 4 oz. Brightwell Aquatics AngeLixir Food Soak, 125 ml./ 4 oz.

    Brightwell Aquatics

    Brightwell Aquatics AngeLixir Food Soak, 125 ml./ 4 oz.

    Free-Form Amino Acid Food Soak for Spongivorous Marine Fishes Overview * Complex of free-form amino acids in the same ratios found within tissues of sponges. * Utilizes natural attractants and marine-derived proteins to improve feeding response and...

    $31.95
  • Brightwell Aquatics Koralle-VM, 500 ml. / 17 oz.

    Brightwell Aquatics

    Brightwell Aquatics Koralle-VM, 500 ml. / 17 oz.

    Unique vitamin and minor and trace element complex for establishing and replacing substances importantto marine invertebrates...Brightwell Aquatics Koralle-VM, 500 ml. / 17 oz.* Unique vitamin and minor and trace element complex for establishing and...

    $31.95
  • Brightwell Aquatics RedoxIClean, 2 Liters / 67.6 oz.

    Brightwell Aquatics

    Brightwell Aquatics RedoxIClean, 2 Liters / 67.6 oz.

    Brightwell Aquatics RedoxIClean, Improves Water Quality in all Reef, Marine and Freshwater AquariaBrightwell Aquatics RedoxIClean, 2 Liters / 67.6 oz.OverviewImmediately improves water quality in all manner of aquaria by enhancing the rate of particulate...

    $31.95
  • DrTim's Aquatics MARINE First Defense 32oz. DrTim's Aquatics MARINE First Defense 32oz.

    Dr. Tim's Aquatics

    DrTim's Aquatics MARINE First Defense 32oz.

    DrTim's Aquatics MARINE First Defense 32oz. Changing the environment of a fish causes stress that robs the fish of essential nutrients and can weaken their immune system. First Defense is scientifically designed to provide stress relief and support the...

    $31.17
  • DrTim's Aquatics NP-Active Pearls 450ml DrTim's Aquatics NP-Active Pearls 450ml DrTim's Aquatics NP-Active Pearls 450ml DrTim's Aquatics NP-Active Pearls 450ml DrTim's Aquatics NP-Active Pearls 450ml

    Dr. Tim's Aquatics

    DrTim's Aquatics NP-Active Pearls 450ml

    DrTim's Aquatics NP-Active Pearls 450ml A novel, innovative way, using PURE biodegradable bio-polymers, to control nitrate and phosphate in your aquarium. Specially developed for aquariums Works in ALL aquariums Safe for ALL fish and corals PURE -...

    $30.95
  •  Ruby Reef HydroPlex 32 oz.  Ruby Reef HydroPlex 32 oz.

    Ruby Reef

    Ruby Reef HydroPlex 32 oz.

    Ruby Reef HydroPlex 32 oz. HYDROPLEX is an extremely broad spectrum dip for new arrivals. A simple 10 minute dip is all it takes toeliminate problems which can be brought on by fish being introduced into the display tank.Due to its excellent...

    $29.99
  • DrTim's Aquatics Ammonium Chloride, 500g.

    Dr. Tim's Aquatics

    DrTim's Aquatics Ammonium Chloride, 500g.

    DrTim's Aquatics Ammonium Chloride, 500g. One of our most popular products is our Ammonium Chloride for fishless cycling. As the term implies fishless cycling means without fish but there needs to be a source of ammonia for the nitrifying bacteria.

    $29.99
  • Neomycin Sulfate – Treats 200 Gallons

    AquaLife

    Neomycin Sulfate – Treats 200 Gallons

    Neomycin Sulfate – Treats 200 Gallons Effective against: -Open Sores -Internal Swelling -Loss of Color -Body Distortion -Body and Fin Rot -Bacterial Infections -Guppy Disease -Furunculosis For Ornamental Fish Use Only Not For Human Consumption...

    $29.99
  • Praziquantel – Treats 250 Gallons

    AquaLife

    Praziquantel – Treats 250 Gallons

    Praziquantel – Treats 250 Gallons Effective against: -External Parasites -Flukes -Flatworms -Turbellaria -Tapeworms -For Ornamental Fish Use Only -Not For Human Consumption – use only as directed.   Praziquantel is effective against...

    $29.99
  • Ruby Reef Kick-Ich Pro 32 oz. Ruby Reef Kick-Ich Pro 32 oz.

    Ruby Reef

    Ruby Reef Kick-Ich Pro 32 oz.

    Ruby Reef Kick-Ich Pro 32 oz. KICK-ICH is a treatment designed to be used in the display tank for the control of Ich on fish (a.k.a. “white spot disease) in marine and freshwater aquaria. It has been scientifically formulated to treat infectious stage...

    $29.99
  • Ruby Reef Rally Pro 32 oz. Ruby Reef Rally Pro 32 oz.

    Ruby Reef

    Ruby Reef Rally Pro 32 oz.

    Ruby Reef Rally Pro 32 oz. RALLY is a very effective broad spectrum treatment designed to be used directly in the display tank to eliminate external parasites, dinoflagellates, marine velvet, clownfish disease, gill flukes, etc. on fish. RALLY also...

    $29.99
  • Tropic Marin Reef Actif, 100 ml./60 gr. Tropic Marin Reef Actif, 100 ml./60 gr.

    Tropic Marin

    Tropic Marin Reef Actif, 100 ml./60 gr.

    Tropic Marin Reef Actif, 100 ml./60 gr. Tropic Marin Reef Actif performs a unique dual function as an absorber and bacterial nutrient in saltwater aquariums. In doing this it assumes a central function as the link between inorganic nutrients and the...

    $29.99
  • ZeoVit Iron Concentrate, 100 ml.

    ZeoVit

    ZeoVit Iron Concentrate, 100 ml.

    ZeoVit Iron ConcentrateZeoVit Iron Concentrate, 100 ml.The addition of iron affects all colors but primarily enhances the green color formation. Iron encreases coral growth and also the multiplication of zooxanthella. Well suited for all kind of...

    $39.99
    $29.99
  •  Seachem Reef Advantage Calcium, 1,000 gr.  Seachem Reef Advantage Calcium, 1,000 gr.

    Seachem

    Seachem Reef Advantage Calcium, 1,000 gr.

     Seachem Reef Advantage Calcium, 1,000 gr. Reef Advantage Calcium™ is a non-caustic (pH 8.3–8.6) optimized blend of ionic calcium designed to restore and maintain calcium to levels found in natural seawater. Calcium and carbonates are...

    $29.95
  • ATI ICP-OES Basic Water Analysis - US Version

    ATI

    ATI ICP-OES Basic Water Analysis - US Version

    ATI ICP-OES Basic Water Analysis - US Version The ATI ICP-OES Basic Water Analysis is a laboratory water analysis of 40 parameters in a reef tank that provides a complete overview of a tank's health, which is impossible with traditional test...

    $29.95
  • BlueLife Combo Pack Red Cyano-Rx & Phosphate-Rx BlueLife Combo Pack Red Cyano-Rx & Phosphate-Rx

    BlueLife Combo Pack Red Cyano-Rx & Phosphate-Rx

    BlueLife Combo Pack Red Cyano Rx & Phosphate Rx BlueLife Phosphate Rx - 1 oz Phosphate Rx is an amazingly simple and effective product that has revolutionized the way phosphates are removed from saltwater and freshwater aquariums. When added, the...

    $29.95
  • BlueLife Flux-Rx 200 gal / 4000 mg BlueLife Flux-Rx 200 gal / 4000 mg

    BlueLife Flux-Rx 200 gal / 4000 mg

    BlueLife Flux Rx 200 gal / 4000 mg Flux RxTM is simple and effective with levels easily achieved and maintained quickly for effectiveness when Bryopsis or Green Hair Algae are present.How to prepare product: Turn off skimmer and discontinue using...

    $29.95
  • Brightwell Aquatics Vitamarin-C, 500 ml. / 17 oz.

    Brightwell Aquatics

    Brightwell Aquatics Vitamarin-C, 500 ml. / 17 oz.

    The benefits of vitamin-C to aquatic organisms are largely related to improved tissue growth, particularly after recently-sustained injury or illness. Corals and their allies, in particular, have been observed to benefit tremendously from regular...

    $29.95
  • ESV Calcium Hydroxide, Kalkwasser Powder, 3.5 lb. ESV Calcium Hydroxide, Kalkwasser Powder, 3.5 lb.

    E.S.V.

    ESV Calcium Hydroxide, Kalkwasser Powder, 3.5 lb.

    ESV Calcium Hydroxide, Kalkwasser Powder, 3.5 lb. Dosing with Kalkwasser is one of the very few proven, effective methods to add calcium and alkalinity with a single product while maintaining pH. Commonly used in conjunction with auto top off systems...

    $29.95
  • Sea Lab #28 Replenisher 1 kg. Block Sea Lab #28 Replenisher 1 kg. Block

    Sea Lab #28 Replenisher 1 kg. Block

    Sea Lab #28 Replenisher 1 kg. Block Sea-Lab Formula 28 is a mixture of naturally occurring buffer compounds that maintains natural ocean concentrations of calcium, strontium, and all 15 essential trace elements. Calcium and strontium are well recognized...

    Was: $34.99
    Now: $29.74
  • Two Little Fishes BioPronto Marine, 16 oz.

    Two Little Fishes

    Two Little Fishes BioPronto Marine, 16 oz.

    Two Little Fishes BioPronto MarineTwo Little Fishies BioPronto Marine contains cultured naturally occurring microbes that rapidly start the biological filtration process. Use it to start the nitrification cycle in new aquariums or to enhance...

    $29.33
  •  Boyd's Chemi-Clean 6 Gr.

    Boyd Enterprises

    Boyd's Chemi-Clean 6 Gr.

    Boyd's ChemiClean 6 Gr. Chemiclean cleans stains from red, black, blue-green, and methane (bubble) producing cyanobacteria in marine aquariums.It is completely safe for all fish, corals, invertebrates, and nitrifying bacteria in reef systems. It’s...

    $28.99
  • Boyd's Chemi-Clean Liquid Red Algae Remover, 2 oz.

    Boyd Enterprises

    Boyd's Chemi-Clean Liquid Red Algae Remover, 2 oz.

    Boyds ChemiClean Liquid Red Algae Remover2 Oz. Chemiclean cleans stains from red, black, blue-green, and methane (bubble) producing cyanobacteria in marine aquariums.It is completely safe for all fish, corals, invertebrates, and nitrifying bacteria in...

    $28.99
  • Red Sea Reef Foundations A (Ca/SR) 1 LITER

    Red Sea

    Red Sea Reef Foundations A (Ca/SR) 1 LITER

    Red Sea Reef Foundations A (Ca/SR) 1 LITER Calcium and strontium complex for balanced formation of the coral skeletonCa | Sr Calcium, magnesium, strontium and carbonate are the basic foundation elements of coral skeletons.All of these elements need to...

    $28.99
  • Red Sea Reef Foundations B (Alk) 1 LITER

    Red Sea

    Red Sea Reef Foundations B (Alk) 1 LITER

    Reef Foundation® BCarbonate & buffer complex for balanced formation of Coral SkeletonAlk Calcium, magnesium, strontium and carbonate are the basic foundation elements of coral skeletons.All of these elements need to be available in balanced...

    $28.99
  • Red Sea Reef Foundations C (MG) 1 LITER

    Red Sea

    Red Sea Reef Foundations C (MG) 1 LITER

    Red Sea Reef Foundations C (MG) 1 LITER A successful coral reef aquarium depends on how well you maintain the water parameters which are the key to a stable coral environment. All of the elements found in natural seawater play a role in providing...

    $28.99
  • Seachem Reef Kalkwasser 1 kg. Seachem Reef Kalkwasser 1 kg.

    Seachem

    Seachem Reef Kalkwasser 1 kg.

    Seachem Reef Kalkwasser 1 kg. Very pure calcium hydroxide Ideal for increasing calcium in top-off water Increases pH with no impact on carbonate alkalinity Reef Kalkwasser™ is a pure calcium hydroxide with unsurpassed purity and solubility...

    $28.99
  • ESV Bionic Calcium Buffer System, 2 x 32 oz. ESV Bionic Calcium Buffer System, 2 x 32 oz.

    E.S.V.

    ESV Bionic Calcium Buffer System, 2 x 32 oz.

    ESV Bionic Calcium Buffer System, 2 x 32 oz. B-Ionic Calcium Buffer is the original, unique, easy to use, two-component liquid supplement system. When using equal volumes of each component, the aquarist can easily maintain calcium and alkalinity levels...

    $28.95
  • Sea Lab #28 Replenisher 2 lb. Box Sea Lab #28 Replenisher 2 lb. Box

    Sea Lab #28 Replenisher 2 lb. Box

    Sea Lab #28 Replenisher 2 lb. Box Automatically controls concentrations of 28 elements including calcium, strontium and all 15 essential trace elements.Removes heavy metals and limits ammonia and phosphate while helping to buffer aquarium pH. Available...

    Was: $33.99
    Now: $28.89
  • Red Sea Reef Colors ABCD 100ml 4-Pack Red Sea Reef Colors ABCD 100ml 4-Pack

    Red Sea

    Red Sea Reef Colors ABCD 100ml 4-Pack

    Red Sea Reef Colors ABCD 100ml 4-Pack  Red Sea Coral Colors A, B, C and D supplements contain the 31 minor and trace elements present in the skeleton and soft tissue of all corals. A - halogens (I2, Br, F2), B - potassium and boron, C - Fe and 7...

    $27.99
  • Red Sea Reef Energy AB+ Plus Coral Nutrition, 500 ml Red Sea Reef Energy AB+ Plus Coral Nutrition, 500 ml

    Red Sea

    Red Sea Reef Energy AB+ Plus Coral Nutrition, 500 ml

    Red Sea Reef Energy AB+ Plus Coral Nutrition, 500 ml An all-in-one superfood that will have your corals thanking you, delivering better growth, higher resilience, brighter colors, greater ease of use with automatic dosers, and minimal over skimming...

    $27.99
  • Vibrant 8 oz. - Freshwater Formula Vibrant 8 oz. - Freshwater Formula

    Vibrant 8 oz. - Freshwater Formula

    Vibrant 8 oz. - Freshwater Formula  8 oz. Vibrant Liquid Aquarium Cleaner for Freshwater Aquariums - For Live Planted and Decorative Freshwater AquariumsVibrant is a new revolutionary liquid aquarium cleaner. You can say goodbye to algae, cloudy...

    $27.99
  • Vibrant 8 oz. - Reef Formula Vibrant 8 oz. - Reef Formula Vibrant 8 oz. - Reef Formula

    Vibrant 8 oz. - Reef Formula

    Vibrant 8 oz. - Reef Formula  Vibrant is a new revolutionary liquid aquarium cleaner. You can say goodbye to algae, cloudy water and that grungy, dirty aquarium and say hello to that sparkling, crystal clear, algae free, vibrant aquarium you have...

    $27.99
  • Vibrant 8 oz. - Saltwater Fish Only Formula Vibrant 8 oz. - Saltwater Fish Only Formula Vibrant 8 oz. - Saltwater Fish Only Formula

    Vibrant 8 oz. - Saltwater Fish Only Formula

    Vibrant 8 oz. - Saltwater Fish Only Formula 8 oz. Vibrant Liquid Aquarium Cleaner for Saltwater Aquariums - For Fish Only Saltwater AquariumsVibrant is a new revolutionary liquid aquarium cleaner. You can say goodbye to algae, cloudy water and that...

    $27.99
  •  Triton Bromine Supplement, 1,000ml.   Triton Bromine Supplement, 1,000ml.

    Triton

    Triton Bromine Supplement, 1,000ml.

    Triton Bromine Supplement, 1,000ml The Triton System is based on accurate ICP-OES Testing that tells you exactly how much of any element may be in your aquarium allowing you to keep a healthy, sustainable reef ecosystem. Triton's testing and dosing...

    Was: $32.00
    Now: $27.20
  • Triton Boron Supplement, 1000ml Triton Boron Supplement, 1000ml

    Triton

    Triton Boron Supplement, 1000ml

    Triton Boron Supplement, 1000ml The Triton System is based on accurate ICP-OES Testing that tells you exactly how much of any element may be in your aquarium allowing you to keep a healthy, sustainable reef ecosystem. Triton's testing and dosing...

    Was: $32.00
    Now: $27.20
  • Triton Calcium Supplement, 1000ml Triton Calcium Supplement, 1000ml

    Triton

    Triton Calcium Supplement, 1000ml

    Triton Calcium Supplement, 1000ml The Triton System is based on accurate ICP-OES Testing that tells you exactly how much of any element may be in your aquarium allowing you to keep a healthy, sustainable reef ecosystem. Triton's testing and dosing...

    Was: $32.00
    Now: $27.20
  • Triton Chromium Supplement, 100ml Triton Chromium Supplement, 100ml

    Triton

    Triton Chromium Supplement, 100ml

    Triton Chromium Supplement, 100ml The Triton System is based on accurate ICP-OES Testing that tells you exactly how much of any element may be in your aquarium allowing you to keep a healthy, sustainable reef ecosystem. Triton's testing and dosing...

    Was: $32.00
    Now: $27.20
  • Triton Cobalt Supplement, 100ml Triton Cobalt Supplement, 100ml

    Triton

    Triton Cobalt Supplement, 100ml

    Triton Cobalt Supplement, 100ml The Triton System is based on accurate ICP-OES Testing that tells you exactly how much of any element may be in your aquarium allowing you to keep a healthy, sustainable reef ecosystem. Triton's testing and dosing...

    Was: $32.00
    Now: $27.20
  • Triton Iodine Supplement, 100ml Triton Iodine Supplement, 100ml

    Triton

    Triton Iodine Supplement, 100ml

    Triton Iodine Supplement, 100ml The Triton System is based on accurate ICP-OES Testing that tells you exactly how much of any element may be in your aquarium allowing you to keep a healthy, sustainable reef ecosystem. Triton's testing and dosing...

    Was: $32.00
    Now: $27.20
🔥 SPRING SALE! 🔥