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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.

106 of 106 Items
  • Two Little Fishes AcroPower, 500 ml.

    Two Little Fishies

    Two Little Fishes AcroPower, 500 ml.

    Two Little Fishes AcroPower, 500 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...

    $22.70
  • Red Sea Reef Foundations A (Ca/SR) 500 ML Red Sea Reef Foundations A (Ca/SR) 500 ML

    Red Sea

    Red Sea Reef Foundations A (Ca/SR) 500 ML

    Reef Foundation® A 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 be available in...

    $21.99
  •  Red Sea Reef Colors D (Trace) 500 ML

    Red Sea

    Red Sea Reef Colors D (Trace) 500 ML

    Red Sea Reef Colors D (Trace) 500 MLReef Color D: A complex of 18 trace elements. These 18 elements (out of all the trace elements in NSW) participate in the metabolic processes inside a coral’s skeleton and soft tissue. D elements are related to...

    $20.99
  • Red Sea Reef Colors A (Iodina/Halogens) 500 ML

    Red Sea

    Red Sea Reef Colors A (Iodina/Halogens) 500 ML

    Red Sea Reef Colors A (Iodina/Halogens) 500 MLRed Sea Reef Colors A (Iodina/Halogens) 500 MLReef Color A: A complex of halogens (Iodine, Bromine and Fluorine). The halogens act both as antioxidants and oxidative agents within the soft tissue and mucus...

    $20.99
  • Red Sea Reef Colors B (Potassium) 500 ML

    Red Sea

    Red Sea Reef Colors B (Potassium) 500 ML

    Red Sea Reef Colors B (Potassium) 500 MLRed Sea Reef Colors B (Potassium) 500 MLReef Color B: A complex of Potassium and Boron. Potassium plays an essential role in the transportation of coral nutrients within the soft tissue (including the nutrients...

    $20.99
  • Red Sea Reef Colors C (Iron/Trace) 500 ML

    Red Sea

    Red Sea Reef Colors C (Iron/Trace) 500 ML

    Red Sea Reef Colors C (Iron/Trace) 500 MLReef Color C: A complex of 8 “light” metals that includes Iron, Manganese, Cobalt, Copper, Aluminum, Zinc, Chrome and Nickel. These micro-elements are essential to many bio-chemical metabolic...

    $20.99
  • Red Sea Reef Foundations B (Alk) 500 ML

    Red Sea

    Red Sea Reef Foundations B (Alk) 500 ML

    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...

    $20.99
  • Red Sea Reef Foundations C (MG) 500 ML

    Red Sea

    Red Sea Reef Foundations C (MG) 500 ML

    Red Sea Reef Foundations C (MG) 500 MLA 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 optimal...

    $20.99
  • Copper Power, Marine 16 oz. Copper Power, Marine 16 oz.

    Copper Power

    Copper Power, Marine 16 oz.

     Copper Power, Marine 16 OZ.   Copper Power Marine is one of the safest and most effective copper medications available for the elimination of external parasites. Used at 2.5 PPM Copper - nearly 5-Times the normal toxic level of copper in...

    $19.99
  • CoralRX Coral Dip, 8 oz. Makes 12 gal.

    CoralRX

    CoralRX Coral Dip, 8 oz. Makes 12 gal.

    CoralRX Coral Dip, 8 oz. Makes 12 gal..Coral Rx was developed in 2006 for two purposes: to treat corals suffering with parasites, and as a prophylactic measure to promote healthy corals before parasites or bacterial infections become harmful. Coral Rx is...

    $19.99
  • Nitrofurazone – Treats 200 Gallons

    AquaLife

    Nitrofurazone – Treats 200 Gallons

    Nitrofurazone – Treats 200 Gallons Effective Against: -Red Areas and Body Streaks -Peeling or White Body -Open Ulcers -Wasting Away -Bacterial Infections -Ammonia Exposure -For Ornamental Fish Use Only -Not For Human Consumption – use only...

    $19.99
  • Red Sea Aiptasia X, 60 ml. Red Sea Aiptasia X, 60 ml.

    Red Sea

    Red Sea Aiptasia X, 60 ml.

      Red Sea Aiptasia X, 60 ml. In an exciting development for reef-keepers Red Sea has developed a unique patent pending formula to treat the pest anemones Aiptasia sp., Anemonia majano and Boloceroides sp.Red Sea Aiptasia X, 60 ml..**** PRODUCT...

    $19.99
  • Red Sea Reef Energy B (Aminovit nutrition) - 500ml

    Red Sea

    Red Sea Reef Energy B (Aminovit nutrition) - 500ml

    Red Sea Reef Energy B (Aminovit nutrition) - 500ml Reef Energy B is a highly concentrated complex of vitamins & amino acids that were found to be the limiting factors in the nutritional demands of corals and other invertebrates. Red Sea Reef...

    $19.99
  • MIRACLE MUD Freshwater, 2 lbs. by EcoSystem Aquarium MIRACLE MUD Freshwater, 2 lbs. by EcoSystem Aquarium MIRACLE MUD Freshwater, 2 lbs. by EcoSystem Aquarium MIRACLE MUD Freshwater, 2 lbs. by EcoSystem Aquarium

    EcoSystem Aquarium

    MIRACLE MUD Freshwater, 2 lbs. by EcoSystem Aquarium

    MIRACLE MUD Freshwater, 2 lbs. 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...

    $19.95
  • ATI Elements Bromine Supplement - 1000 ml.

    ATI

    ATI Elements Bromine Supplement - 1000 ml.

    ATI Bromine Supplement - 1000 ml. Bromine is used in some corals for chromoprotein synthesis and for skeleton construction. The ATI Elements Bromine Supplement for Reef Aquariums is available in a 1,000 ml bottle. ATI Water Testing and...

    Was: $22.95
    Now: $19.50
  • ATI Elements Calcium Supplement - 1000 ml. ATI Elements Calcium Supplement - 1000 ml.

    ATI

    ATI Elements Calcium Supplement - 1000 ml.

    ATI Calcium Supplement - 1000 ml. Calcium is a crucial element for stony corals, clams, and calcareous algae. The ATI Elements Calcium Supplement for Reef Aquariums is available in a 1,000 ml bottle. ATI Water Testing and Treatment ATI’s...

    Was: $22.95
    Now: $19.50
  • ATI Elements Potassium Supplement - 1000 ml. ATI Elements Potassium Supplement - 1000 ml.

    ATI

    ATI Elements Potassium Supplement - 1000 ml.

    ATI Potassium Supplement - 1000 ml. Potassium is an essential element in both the skeletal construction and coloration of certain corals. The ATI Elements Potassium Supplement for Reef Aquariums is available in a 1,000 ml bottle. ATI Water Testing...

    Was: $22.95
    Now: $19.50
  • Two Little Fishes Marine Snow, 16oz.

    Two Little Fishies

    Two Little Fishes Marine Snow, 16oz.

    MarineSnow Plankton Diet is a first of its kind product that reproduces the special biogenic suspended matter found in natural seawater, including marine snow aggregates...MarineSnow Plankton Diet is a first of its kind product that reproduces the...

    $18.90
  • Seachem Prime, 500 ml. Seachem Prime, 500 ml.

    Seachem

    Seachem Prime, 500 ml.

    Seachem Prime, 500 ml. Prime™ is the complete and concentrated conditioner for both fresh and salt water. Prime™ removes chlorine, chloramine and ammonia. Prime™ converts ammonia into a safe, non-toxic form that is readily removed...

    $18.69
  • Salifert Flat Worm Exit

    Salifert

    Salifert Flat Worm Exit

    Salifert Flat Worm Exit.Salifert Flatworm Exit is a safe solution to get rid of flatworms in your tank. It is perfectly harmless for the reef inhabitants, both fish and invertebrates, but definitely deadly for the flatworms. Flatworm body juice can...

    $18.49
  • Caribsea Purple Up 16 oz Caribsea Purple Up 16 oz

    CaribSea

    Caribsea Purple Up 16 oz

    PURPLE-UP Coraline Algae Accelerator by CaribSea, 16 oz. NOT A FERTILIZER: Purple Up™ encourages the growth of desirable pink and purple coralline algaes not nuisance algaes not nuisance algaes.UNIQUE DUAL METHOD APPROACH TO CORALLINE ALGAE...

    $17.95
  •  Boyd's Chemi-Clean 2 Gr.

    Boyd Enterprises

    Boyd's Chemi-Clean 2 Gr.

    Boyd's ChemiClean 2 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...

    $17.47
  •  Tropic Marin BIO-CALCIUM, 16 oz.  Tropic Marin BIO-CALCIUM, 16 oz.

    Tropic Marin

    Tropic Marin BIO-CALCIUM, 16 oz.

    Tropic Marin BIO-CALCIUM, 16 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...

    $16.58
  • Two Little Fishes Bactiv8 NPX, 500 ml.

    Two Little Fishies

    Two Little Fishes Bactiv8 NPX, 500 ml.

    Two Little Fishes Bactiv8 NPXTwo Little Fishies Bactiv8 NPX promotes healthy biological filtration by enhancing nitrification and denitrification, as well as promoting the decomposition of organic waste in heavily stocked aquariums. Bactiv8 contains...

    $16.26
  •  Tropic Marin BIO-STRONTIUM, 200gr.   Tropic Marin BIO-STRONTIUM, 200gr.

    Tropic Marin

    Tropic Marin BIO-STRONTIUM, 200gr.

    Tropic Marin BIO-STRONTIUM, 200gr. Tropic Marin Bio-Strontium is biologically Ideal Strontium Supplement for Reef Aquariums. A sufficient supply of strontium and carbon dioxide is as essential for the growth and well-being of reef-building corals...

    $16.14
  • ATI Elements Chromium Supplement - 100 ml.

    ATI

    ATI Elements Chromium Supplement - 100 ml.

    ATI Chromium Supplement - 100 ml. Chromium can aid in producing improved coral coloration and better health. The ATI Elements Chromium Supplement for Reef Aquariums is available in a 100 ml bottle. ATI Water Testing and Treatment ATI’s line...

    Was: $18.95
    Now: $16.10
  • ATI Elements Molybdenum Supplement - 100 ml. ATI Elements Molybdenum Supplement - 100 ml.

    ATI

    ATI Elements Molybdenum Supplement - 100 ml.

    ATI Molybdenum Supplement - 100 ml. In small quantities, Molybdenum aids the biological processes of many beneficial strains of bacteria. The ATI Elements Molybdenum Supplement for Reef Aquariums is available in a 100 ml bottle. ATI Water Testing...

    Was: $18.95
    Now: $16.10
  • ReefHD Reef-Flux - 10 Capsules  ReefHD Reef-Flux - 10 Capsules

    ReefHD

    ReefHD Reef-Flux - 10 Capsules

    ReefHD Reef Flux - 10 Capsules Reef Flux is an aquarium fluconazole treatment that is effective against fungal fish infections. A filter sock is recommended if using Reef Flux in tanks that contain Bryopsis and Caulerpa. To avoid unintended nutrient...

    MSRP: $16.99
    Was: $16.99
    Now: $14.99
  • API Stress Coat + 16 oz. API Stress Coat + 16 oz.

    API

    API Stress Coat + 16 oz.

    API STRESS COAT + 16 OZ. STRESS COAT, with the healing power of aloe vera, is scientifically proven to reduce fish stress and heal damaged tissue. ... Helps heal torn fins and skin wounds. Reduces electrolyte loss. Also works instantly to...

    $13.99
  • Seachem Garlic Guard, 500ml

    Seachem

    Seachem Garlic Guard, 500ml.

    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 garlic, allicin, which has been...

    $12.95
  • Seachem Reef Advantage Magnesium, 600 gr. Seachem Reef Advantage Magnesium, 600 gr.

    Seachem

    Seachem Reef Advantage Magnesium, 600 gr.

    Reef Advantage Magnesium is a concentrated (80,000 ppm) optimized blend of magnesium, chloride, and sulfate salts designed to restore depleted levels of magnesium...Seachem Reef Advantage Magnesium, 600 gr.Reef Advantage Magnesium™ is a...

    $12.95
  • ZeoVit Cyano Clean, 10 ml.

    ZeoVit

    ZeoVit Cyano Clean, 10 ml.

    ZeoVit Cyano Clean, 10 ml. Developed as a companion product to Coral Snow and Zeozym, Cyano Clean safely eliminates unsightly red slime algae (Cyanobacteria) from the reef tank. Cyano Clean is formulated with select nutrient scavenging bacteria strains...

    MSRP: $18.99
    Was: $14.24
    Now: $12.10
  • Seachem Reef Strontium 500 ml. Seachem Reef Strontium 500 ml.

    Seachem

    Seachem Reef Strontium 500 ml.

    Reef Strontium is intended to restore and maintain strontium to levels found in natural seawater without affecting pH. Strontium is utilized in the same manner as calcium and holds a similar importance in maintaining a vigorous level of growth.Reef...

    $11.95
  •  Seachem Reef Plus, 500 ml.   Seachem Reef Plus, 500 ml.

    Seachem

    Seachem Reef Plus, 500 ml.

    Seachem Reef Plus, 500 ml. SeaChem 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...

    $11.92
  • Seachem Reef Iodine 500 ml. Seachem Reef Iodine 500 ml.

    Seachem

    Seachem Reef Iodine 500 ml.

    Seachem Reef Iodine 500 ml. Reef Iodide is a concentrated (8,000 mg/L) stabilized potassium iodide source for reef aquaria that will restore and maintain iodide levels to those found in natural sea water. It is formulated to provide a safe source...

    $11.47
  • Seachem Reef Carbonate 500 ml. Seachem Reef Carbonate 500 ml.

    Seachem

    Seachem Reef Carbonate 500 ml.

    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...Reef Carbonate is a concentrated (4,000 meq/L) optimized blend of carbonate and...

    $10.99
  • Seachem ENTICE Appetite Stimulant, 250 ml. Seachem ENTICE Appetite Stimulant, 250 ml.

    Seachem

    Seachem ENTICE Appetite Stimulant, 250 ml.

    Seachem ENTICE Appetite Stimulant, 250 ml. Entice is an all natural scent and flavor enhancer for finicky eaters. Simply soak any food item in Entice to attract the interest of finicky eaters. Ideal for all marine and freshwater fish.Directions: Briefly...

    $8.95
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