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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.

  • Triton Calcium Increaser CaC12, 4 kg Triton Calcium Increaser CaC12, 4 kg

    Triton

    Triton Calcium Increaser CaC12, 4 kg

    Triton Calcium Increaser CaC12, 4 kg Calcium is used by all corals and most marine invertebrates to create a calcium carbonate structure, and over time the calcium level in your aquarium may drop below proper levels. In almost all reef tanks a calcium...

    Was: $52.00
    Now: $44.20
  • Triton Magnesium Increaser MGCL2, 4 kg Triton Magnesium Increaser MGCL2, 4 kg

    Triton

    Triton Magnesium Increaser MGCL2, 4 kg

    Triton Magnesium Increaser MGCL2, 4 kg Without magnesium, you would not be able to hold the proper amounts of calcium and alkalinity, and they would simply fall out of solution. Magnesium is essentially a buffer between calcium and alkalinity and is...

    Was: $52.00
    Now: $44.20
  • Seachem Garlic Guard, 2 Liters  Seachem Garlic Guard, 2 Liters

    Seachem

    Seachem Garlic Guard, 2 Liters

    Seachem Garlic Guard, 2 Liters Garlic Guard is an appetite/flavor enhancer for freshwater and saltwater fish. GarlicGuard will help renew the interest of poor or finicky eaters. GarlicGuard contains the naturally derived, active ingredient found in...

    $43.99
  • BlueLife Flux-Rx 350 gal / 7000 mg BlueLife Flux-Rx 350 gal / 7000 mg

    BlueLife Flux-Rx 350 gal / 7000 mg

    BlueLife Flux Rx 350 gal / 7000 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...

    $42.95
  • Kalkwasser by Two Little Fishes, 4 lb.

    Two Little Fishes

    Kalkwasser by Two Little Fishes, 4 lb.

    Reef Kalkwasser is a pure calcium hydroxide with unsurpassed purity and solubility characteristics...Kalkwasser by Two Little Fishes, 4 lb.Calcium Supplement Mix. Our pure source of Calcium Hydroxide makes the ideal solution for replenishing calcium and...

    $42.58
  • Polyplab Colors 200% Amino Acids Polyplab Colors 200% Amino Acids

    PolypLab

    Polyplab Colors 200% Amino Acids

    Polyplab Colors 200% Amino Acids Polyplab Colors is ulta pure Amino Acids engineered for the most demanding growers. It is designed for:- Ultra Low Nutrient Systems- Reverse Coral Bleaching By Quickly Removing Excess Nutrients- Promotes...

    Was: $49.99
    Now: $42.49
  • Tropic Marin Pro-Tect 1000mL

    Tropic Marin

    Tropic Marin Pro-Tect 1000mL

    Tropic Marin Pro-Tect 1000mL Tropic Marin® Pro-Tect improves the quality of the water – especially in fish aquariums – through a combination of highly efficient active ingredients. The welfare of the animals is improved.The...

    $42.27
  • Tropic Marin BIO-MAGNESIUM, 53 oz. Tropic Marin BIO-MAGNESIUM, 53 oz.

    Tropic Marin

    Tropic Marin BIO-MAGNESIUM, 53 oz.

    Tropic Marin BIO-MAGNESIUM, 53 oz. Tropic Marin Bio-Magnesium is biologically ideal Magnesium Supplement for Reef Aquariums. A sufficient supply of magnesium is as essential for the growth and well being of reef building coralline algae as calcium...

    $42.00
  • Brightwell Aquatics Vitamarin-M, 500 ml. / 17 oz.

    Brightwell Aquatics

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

    Brightwell Aquatics Vitamarin-M 500 ml. / 17 oz. * Full-spectrum vitamin supplement formulated to benefit marine fishes, corals and other invertebrates, and other marine aquarium inhabitants.* Provides a full-complement of vitamins in the same...

    $40.95
  •  DrTim's Aquatics FRESHWATER One & Only 8oz  DrTim's Aquatics FRESHWATER One & Only 8oz

    Dr. Tim's Aquatics

    DrTim's Aquatics FRESHWATER One & Only 8oz

    DrTim's Aquatics FRESHWATER One & Only 8oz Eliminates new tank syndrome Instantly creates a biofilter Removes toxic ammonia and nitrite, naturally No sulfur or other offensive odors No wait needed 100% natural Good for 6 months at room...

    $39.99
  • DrTim's Aquatics MARINE Re-Fresh 16oz. DrTim's Aquatics MARINE Re-Fresh 16oz.

    Dr. Tim's Aquatics

    DrTim's Aquatics MARINE Re-Fresh 16oz.

    DrTim's Aquatics MARINE Re-Fresh 16oz Control Green or Brown Water in your Reef, Nano, or Seahorse Aquarium Use Dr.Tim's Re-Fresh in your reef, nano, or seahorse aquarium to control brown or green water issues. Re-Fresh is a potent combination of...

    $39.99
  • PolypLab Reef Primer Coral Dip 180 gr. PolypLab Reef Primer Coral Dip 180 gr.

    PolypLab

    PolypLab Reef Primer Coral Dip 180 gr.

    PolypLab Reef Primer Coral Dip 180 gr. TO BE USED AS A DIP ONLY. Not to be used in the aquarium. Reef Primer is a premium dip for your corals and frags. Use in your acclimation routine before adding new corals to your system. Reef Primer will clean...

    $39.99
  • Red Sea Reef Energy AB+ Plus Coral Nutrition, 1000 ml Red Sea Reef Energy AB+ Plus Coral Nutrition, 1000 ml

    Red Sea

    Red Sea Reef Energy AB+ Plus Coral Nutrition, 1000 ml

    Red Sea Reef Energy AB+ Plus Coral Nutrition, 1000 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...

    $39.99
  • Ruby Reef HydroPlex 64 oz. Ruby Reef HydroPlex 64 oz.

    Ruby Reef

    Ruby Reef HydroPlex 64 oz.

    Ruby Reef HydroPlex 64 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...

    $39.99
  • Ruby Reef Kick-Ich Pro 64 oz. Ruby Reef Kick-Ich Pro 64 oz.

    Ruby Reef

    Ruby Reef Kick-Ich Pro 64 oz.

    Ruby Reef Kick-Ich Pro 64 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...

    $39.99
  • Ruby Reef Rally Pro 64 oz. Ruby Reef Rally Pro 64 oz.

    Ruby Reef

    Ruby Reef Rally Pro 64 oz.

    Ruby Reef Rally Pro 64 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...

    $39.99
  • Seachem Reef Carbonate 2 Liters Seachem Reef Carbonate 2 Liters

    Seachem

    Seachem Reef Carbonate 2 Liters

    Seachem Reef Carbonate 2 Liters Reef Carbonate is a concentrated (4,000 meq/L) optimized blend of carbonate and bicarbonate salts designed to restore and maintain alkalinity in the reef aquarium. Calcium and carbonates are essential to all coral growth...

    $39.99
  • Tropic Marin Cyo-Control 500mL

    Tropic Marin

    Tropic Marin Cyo-Control 500mL

    Tropic Marin Cyo-Control 500mL Tropic Marin® Cyo-Control naturally blocks the recurrence of cyanobacteria in the aquarium. After the cyanobacteria have been removed manually, the probiotic bacteria of Tropic Marin®...

    $39.99
  • ESV Bionic Magnesium, 1 gal. ESV Bionic Magnesium, 1 gal.

    E.S.V.

    ESV Bionic Magnesium, 1 gal.

    ESV Bionic Magnesium, 1 gal. When used with calcium and alkalinity supplements, magnesium plays an important role in stablilizing pH in your reef tank. B-Ionic Magnesium is an easy to use liquid magnesium supplement which  will not disrupt the...

    $39.95
  • MIRACLE MUD 2, FRESHWATER 5 lb. by EcoSystem Aquarium

    EcoSystem Aquarium

    MIRACLE MUD 2, FRESHWATER 5 lb. by EcoSystem Aquarium

    MIRACLE MUD 2, FRESHWATER 5 lb. by EcoSystem Aquarium Miracle Mud is a product of EcoSystem Aquarium® that has been carefully formulated to include all the essential trace elements, minerals, and components necessary to maintain a successful...

    $39.95
  • MIRACLE MUD, Marine 5 lb. by EcoSystem Aquarium

    EcoSystem Aquarium

    MIRACLE MUD, Marine 5 lb. by EcoSystem Aquarium

    MIRACLE MUD, Marine 5 lb. by EcoSystem Aquarium Miracle Mud is a product of EcoSystem Aquarium® that has been carefully formulated to include all the essential trace elements, minerals, and components necessary to maintain a successful aquarium...

    $39.95
  • Seachem Reef Calcium, 2 liter Seachem Reef Calcium, 2 liter

    Seachem

    Seachem Reef Calcium, 2 liter

    Reef Calcium is a concentrated (50,000 mg/L) bioavailable polygluconate complexed calcium intended to maintain calcium in the reef aquarium without altering pH...Seachem Reef Calcium, 2 literReef Calcium™ is a concentrated (50,000 mg/L)...

    $39.95
  • Seachem Reef Plus, 2 liter Seachem Reef Plus, 2 liter

    Seachem

    Seachem Reef Plus, 2 liter

    Seachem Reef Plus, 2 literSeaChem Reef Plus ™ is a full spectrum reef supplement containing trace elements, vitamins, and amino acids demonstrated to have a positive impact on the growth of corals and other desirable reef creatures. Reef...

    $39.95
  • Tropic Marin NP Bacto Balance 1000 ml. Tropic Marin NP Bacto Balance 1000 ml.

    Tropic Marin

    Tropic Marin NP Bacto Balance 1000 ml.

    Tropic Marin NP Bacto Balance 1000 ml. Mixture of selected organic compounds to promote the incorporation of nitrate and phosphate in supplementary biomass. The ratio of nutrients is ideal for corals, sponges and other invertebrate animals found in...

    $39.04
  • Seachem Reef Fusion #1 4 LIters Seachem Reef Fusion #1 4 LIters

    Seachem

    Seachem Reef Fusion #1 4 LIters

    Seachem Reef Fusion #1 4 LIters Reef Fusion two-part system Product Description Reef Fusion 1� and Reef Fusion 2� are the foundation of a system formulated to provide the essentials for the reef aquarium. Reef Fusion 1� provides calcium, while...

    $38.99
  • Seachem Reef Kalkwasser 2 kg. Seachem Reef Kalkwasser 2 kg.

    Seachem

    Seachem Reef Kalkwasser 2 kg.

    Seachem Reef Kalkwasser 2 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...

    $38.99
  • Triton Strontium Supplement, 1000ml Triton Strontium Supplement, 1000ml

    Triton

    Triton Strontium Supplement, 1000ml

    Triton Strontium 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: $45.00
    Now: $38.25
  •  Vibrant 16 oz. - Freshwater Formula    Vibrant 16 oz. - Freshwater Formula

    Vibrant 16 oz. - Freshwater Formula

     Vibrant 16 oz. - Freshwater Formula     16 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...

    $37.99
  • Vibrant 16 oz. - Reef Formula Vibrant 16 oz. - Reef Formula

    Vibrant 16 oz. - Reef Formula

    Vibrant 16 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...

    $37.99
  • Vibrant 16 oz. - Saltwater Fish Only Formula Vibrant 16 oz. - Saltwater Fish Only Formula Vibrant 16 oz. - Saltwater Fish Only Formula

    Vibrant 16 oz. - Saltwater Fish Only Formula

    Vibrant 8 oz. - Saltwater Fish Only Formula 16 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...

    $37.99
  • Seachem Safe 1 Kg. Seachem Safe 1 Kg.

    Seachem

    Seachem Safe 1 Kg.

    Seachem Safe 1 Kg. Description Safe� is the complete and concentrated dry conditioner for both fresh and salt water. Safe� removes chlorine, chloramine, and ammonia. Safe� converts ammonia into a safe, non-toxic form that is readily removed by...

    $37.52
  • Polyp Lab Medic 30 ml. Polyp Lab Medic 30 ml.

    PolypLab

    Polyp Lab Medic 30 ml.

    Polyp Lab Medic 30 ml. Medic is a highly effective water conditioner used to control external fish parasites present in both marine and freshwater environments. It contains a reef-safe oxidizing agent and is particularly effective against:Marine Ich -...

    $36.99
  • Seachem Reef Fusion #2 4 Liters Seachem Reef Fusion #2 4 Liters

    Seachem

    Seachem Reef Fusion #2 4 Liters

    Seachem Reef Fusion #2 4 Liter Reef Fusion two-part system Product Description Reef Fusion 1� and Reef Fusion 2� are the foundation of a system formulated to provide the essentials for the reef aquarium. Reef Fusion 1� provides calcium, while...

    $36.99
  • Brightwell Aquatics Clarifi-FW 2 Liters. Brightwell Aquatics Clarifi-FW 2 Liters.

    Brightwell Aquatics

    Brightwell Aquatics Clarifi-FW 2 Liters.

    Brightwell Aquatics Clarifi-FW 2 Liters. Advanced Clarifier for all Freshwater and Planted Aquaria  Overview Flocculant for improving water clarity in freshwater aquaria; helps eliminate cloudy water. Binds particulate material suspended in...

    $36.95
  • Brightwell Aquatics Clarifi-SW, 2 Liters / 67.6 oz.

    Brightwell Aquatics

    Brightwell Aquatics Clarifi-SW, 2 Liters / 67.6 oz.

    Brightwell Aquatics Clarifi-SW, Advanced Clarifier for All Marine Fish and Reef AquariaPoor water clarity can be caused by a number of types of suspended particulate material, which may themselves be caused by excessive nutrient concentrations,...

    $36.95
  • Tropic Marin All-For-Reef, 1000 ml. Tropic Marin All-For-Reef, 1000 ml.

    Tropic Marin

    Tropic Marin All-For-Reef, 1000 ml.

     Tropic Marin All-For-Reef, 1000 ml. Tropic Marin All-For-Reef contains all the essential minerals and trace elements required by corals to grow in an easy to use balanced solution. Including calcium, magnesium, strontium, and carbonate hardness...

    $36.83
  • Triton Sulphate Supplement, 1000ml Triton Sulphate Supplement, 1000ml

    Triton

    Triton Sulphate Supplement, 1000ml

    Triton Sulphate 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: $42.00
    Now: $35.70
  • Tropic Marin ABC Liquid Balling Set A+B+C, 3 x 1000 ml. Tropic Marin ABC Liquid Balling Set A+B+C, 3 x 1000 ml.

    Tropic Marin

    Tropic Marin ABC Liquid Balling Set A+B+C, 3 x 1000 ml.

    Tropic Marin ABC Liquid Balling Set A+B+C, 3 x 1000 ml. The 3 components used in "The Balling Method" of supplementation Allows independent dosage of calcium (Part A) and carbonates (Part B) Sodium chloride free sea salt (Part C) maintains critical...

    $34.99
  • Two Little Fishes AcroPower, 1,000 ml.

    Two Little Fishes

    Two Little Fishes AcroPower, 1,000 ml.

    Two Little Fishes AcroPower, 1000 ml. Use AcroPower from Two Little Fishies to provide amino acids to your corals to help build their skeletal structure. Amino acids can easily deplete in reef aquarium systems through protein skimmers and ultra low...

    $34.98
  • Seachem Reef Complete, 2 liter Seachem Reef Complete, 2 liter

    Seachem

    Seachem Reef Complete, 2 liter

    Seachem Reef Complete, 2 liter Reef Complete™ is a concentrated (160,000 mg/L) optimized blend of ionic calcium designed to restore and maintain calcium to levels found in natural seawater without affecting pH. Calcium and carbonates are...

    $34.95
  • Tropic Marin PRO-CORAL A- ELEMENTS, 1,000 ml.

    Tropic Marin

    Tropic Marin PRO-CORAL A- ELEMENTS, 1,000 ml.

    Tropic Marin PRO-CORAL A- ELEMENTS, 1,000ml. In the ocean, there are tiny amounts of essential trace elements such as iodine, lithium, manganese, etc. that can be depleted rapidly in household aquariums as corals and invertebrates grow. Tropic Marin...

    $34.94
  • Tropic Marin PRO-CORAL K+ ELEMENTS, 1,000ml. Tropic Marin PRO-CORAL K+ ELEMENTS, 1,000ml.

    Tropic Marin

    Tropic Marin PRO-CORAL K+ ELEMENTS, 1,000ml.

    Tropic Marin PRO-CORAL K+ ELEMENTS, 1,000ml. In the ocean, there are tiny amounts of essential trace elements such as iodine, lithium, manganese, etc. that can be depleted rapidly in household aquariums as corals and invertebrates grow. Tropic Marin...

    $34.94
  • ZeoVit ZeoSpur Macroelements, 250 ml.

    ZeoVit

    ZeoVit ZeoSpur Macroelements, 250 ml.

    ZeoVit ZeoSpur MacroelementsZEOspur Macroelements is a result of further development of the Zeovit system. It is the optimal addition to ZEOspur 2.......ZeoVit ZeoSpur Macroelements, 250 ml. ZEOspur Macroelements is a result of further development of the...

    $44.99
    $33.75
  • BlueLife Flatworm Rx 1 oz

    BlueLife

    BlueLife Flatworm Rx 1 oz

    BlueLife Flatworm Rx 1 oz   Flatworm Rx is an exceptionally fast, safe and effective treatment for flatworms in your reef or fish only saltwater aquarium. This innovative product prevents disruptions in the biological processes as well as coral...

    $33.69
  •  Tropic Marin CarboCalcium, 1,000 ml.   Tropic Marin CarboCalcium, 1,000 ml.

    Tropic Marin

    Tropic Marin CarboCalcium, 1,000 ml.

    Tropic Marin CarboCalcium, 1,000 ml. Tropic Marin Carbo-Calcium contains a balanced ratio of calcium and carbonate (alkalinity) in a single solution. Traditionally two or more solutions are required but Carbo-Calcium relies on biological processes to...

    $33.60
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