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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.

  • Seachem Reef Trace 2 Liter. Seachem Reef Trace 2 Liter.

    Seachem

    Seachem Reef Trace 2 Liter.

    Seachem Reef Trace 2 Liter. Reef Trace supplies a broad range of trace elements demonstrated to be necessary for proper reef health and growth.Trace elements are normally depleted by utilization, oxidation and precipitation. The latter two processes...

    $49.95
  • 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...

    $49.92
  • Triton ICP-OES Testing Kit Triton ICP-OES Testing Kit

    Triton

    Triton ICP-OES Testing Kit

    Triton ICP-OES Testing Kit We have been utilizing Triton's ICP-OES testing system for some time with aquariums, additives, and almost any other liquid that we have wanted to know what is in it exactly. Triton now gives you the ability to know what is in...

    $49.00
  • 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...

    $48.67
  • Tropic Marin All-for-Reef Power Mix 800gr. Tropic Marin All-for-Reef Power Mix 800gr.

    Tropic Marin

    Tropic Marin All-for-Reef Power Mix 800gr.

    Tropic Marin All-for-Reef Power Mix 800gr. Tropic Marin All-For-Reef revolutionized aquarium additive dosing with their original pre-mixed solution, and now this same formula is available in an ultra-concentrated crystalline form that you can easily mix...

    $47.18
  • 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...

    $46.51
  • 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...

    $46.20
  • DrTim's Aquatics MARINE Clear-Up 32oz. DrTim's Aquatics MARINE Clear-Up 32oz.

    Dr. Tim's Aquatics

    DrTim's Aquatics MARINE Clear-Up 32oz.

    DrTim's Aquatics MARINE Clear-Up 32oz. Clear-UP clears cloudy white water.  Clear-UP is a 100% natural water clarifier consisting of beneficial bacteria, with the ability to "floc" small particles from the aquarium water.The result is clear water...

    $45.99
  • 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...

    $45.00
  • 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...

    $44.99
  • 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...

    $44.99
  • Brightwell Aquatics CoralAmino, 125 ml. / 4 oz.

    Brightwell Aquatics

    Brightwell Aquatics CoralAmino, 125 ml. / 4 oz.

    * Complex of free-form amino acids in the same ratios found within tissues of stony corals.* Beneficial to all corals (stony and soft), as well as solitary and colonial polyps.* Free-form amino acids:1. Provide the building blocks of coral tissue in...

    $44.95
  • Brightwell Aquatics Fish recover Fw (Fresh) 2 Liters Brightwell Aquatics Fish recover Fw (Fresh) 2 Liters

    Brightwell Aquatics

    Brightwell Aquatics Fish recover Fw (Fresh) 2 Liters

    Brightwell Aquatics Fish recover Fw (Fresh) 2 Liters. natural herbal medication for open sores, redness in fins body, cloufy eyes, tail and fin rot Overview All-Natural, botanical extract remedy for the treatment of a broad spectrum of bacterial...

    $44.95
  • 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
  • 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...

    $42.95
  • 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...

    $42.59
  • Kalkwasser by Two Little Fishes, 4 lb.

    Two Little Fishies

    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
  • 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...

    $42.00
  • 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)...

    $41.41
  • 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...

    $41.41
  • 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
  • Tropic Marin Block Iodine 1000mL

    Tropic Marin

    Tropic Marin Block Iodine 1000mL

    Tropic Marin Block Iodine 1000mL Description Tropic Marin Block Iodine is a concentrated solution for adding iodine, fluorine, bromine, and selenium if there are deficits in the aquarium. The halogen iodine, fluorine, and bromine are incorporated in...

    $40.57
  • Tropic Marin Block Molybdenum 1000mL

    Tropic Marin

    Tropic Marin Block Molybdenum 1000mL

    Tropic Marin Block Molybdenum 1000mL Description Concentrated solution for adding molybdenum, rubidium, vanadium, tungsten, tellurium, and hafnium if there are deficits in the aquarium. Molybdenum, vanadium, and tungsten are associated with key...

    $40.57
  • Tropic Marin Block Nickel 1000mL

    Tropic Marin

    Tropic Marin Block Nickel 1000mL

    Tropic Marin Block Nickel 1000mL Description Concentrated solution for adding nickel, manganese, iron, cobalt, and boron if there are deficits in the aquarium. The transition metals nickel, manganese, iron, and cobalt are key catalysts in the metabolism,...

    $40.57
  • Tropic Marin Block Strontium 1000mL

    Tropic Marin

    Tropic Marin Block Strontium 1000mL

    Tropic Marin Block Strontium 1000mL Description Concentrated solution for adding strontium and barium if there are deficits in the aquarium. As an alkaline earth metal, strontium and barium are essential for skeletal growth in corals, and other marine...

    $40.57
  • Tropic Marin Block Zinc 1000mL

    Tropic Marin

    Tropic Marin Block Zinc 1000mL

    Tropic Marin Block Zinc 1000mL Description Concentrated solution for adding zinc, copper, chromium, and gallium if there are deficits in the aquarium. The transition metals zinc, copper, and chromium are key catalysts in the metabolism, and brighten the...

    $40.57
  • 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...

    $40.51
  •  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 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...

    $39.99
  • PolypLab Genesis Rock PolypLab Genesis Rock

    PolypLab

    PolypLab Genesis Rock

    PolypLab Genesis Rock Increase the overall filtration power of your tank by adding Genesis Rock to your system.  -Designed For Fresh or Saltwater Aquariums-23,000+ Additional Square Feet of Bacterial Space For Each Rock-2 Rocks Included in Set-Reduces...

    $39.99
  • PolypLab Medic 30 ml. PolypLab Medic 30 ml.

    PolypLab

    PolypLab 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 -...

    $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 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...

    $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
  • 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 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 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...

    $38.99