ADDITIVES (439)
Best selling Best selling
  • Seachem Stability - 250 mL / 8.5 fl. oz.
    $7.19 $8.99
    No reviews

    Stability Product Description Stability will rapidly and safely establish the aquarium biofilter in freshwater and marine systems, thereby preventing the...

  • Copper Power Blue 16oz
    $16.99
    No reviews

    COPPER POWER has been a preferred choice for marine fish enthusiasts fish stores, and aquariums since 1984. We are happy...

  • Two Little Fishes AcroPower Amino Acids for SPS corals - 250
    $14.51
    No reviews

    Two Little Fishes AcroPower Amino Acids for SPS corals - 250 AcroPower supplies amino acids that corals need to build...

  • Brightwell Aquatics CoralAmino - Free Form Amino Acid Supplement 250ml
    $51.29
    No reviews

    Overview: Complex of free-form amino acids in the same ratios found within tissues of stony corals. Beneficial to all corals...

  • Fauna Marin ELEMENTALS TRACE NI - Nickel 250ml
    $27.49
    No reviews

    Highly Concentrated Nickel Fauna Marin Elementals Trace Ni is a high purity Nickel solution for compensating Nickel deficiencies in reef...

  • Fauna Marin ELEMENTALS TRACE Fe - Iron 250ml
    $27.49
    No reviews

    Highly Concentrated Iron Fauna Marin Elementals Trace Fe is a high purity Iron solution for compensating Iron deficiencies in reef...

  • Fauna Marin Multi Elements B Trace Element Complex 500 ml
    $28.59
    No reviews

    Multi Elements B - Trace Element Solution for Calcium Reactor Users Multi Elements B contains substances and compounds essential for...

  • ME Coral Iodine 2 oz
    $15.99 $19.99
    No reviews

    ME Iodine concentrate is a pharmaceutical grade concentrated additives for maintaining appropriate levels of Iodine in modern aquariums.  Iodine levels...

  • ATI Elements - Vanadium 100ml
    $18.95

    OUT OF STOCK

    No reviews

    ATI Elements ATI Elements give you complete control to fine tune the amounts of trace minerals your aquarium needs. With...

  • ATI Elements - Bromine 1000ml
    $22.95
    No reviews

    ATI Elements ATI Elements give you complete control to fine tune the amounts of trace minerals your aquarium needs. With...

  • ESV B-Ionic Transition Elements PLUS+ 32oz
    $26.39 $32.99
    No reviews

    B-Ionic Transition Elements PLUS+   B-Ionic Transition Elements Plus is the latest product by ESV, formulated by Bob Stark in...

  • Red Sea Reef Colors C (Iron/Trace) 500ml
    $20.99
    No reviews

    Coral Colors C An iron and complementary trace element complex that promotes the Green colors in corals Fe & Trace...

  • Red Sea 4-Part Complete Reef Care - Medium Pack (80 gal)
    $114.99

    OUT OF STOCK

    No reviews

    Complete 4-part Supplement Program Optimal coral growth & coloration in non-refugium systems. Simplify your supplementing routine at no extra cost!...

  • Fauna Marin Balling Salts Kh 4 kg
    $54.99
    No reviews

    Salt Carbonate Mix for Balling Light Systems in Reef Tanks With Fauna Marin Balling-Light salts, you get the purest specialty...

  • Fauna Marin Balling Salts Ca 2 kg
    $32.99
    No reviews

    Salt Calcium Mix for Balling Light Systems in Reef Tanks With Fauna Marin Balling-Light salts, you get the purest specialty...

  • Fauna Marin ELEMENTALS TRACE Cu - Copper 250ml
    $27.49
    No reviews

    Highly Concentrated Copper  Fauna Marin Elementals Trace Cu is a high purity Copper solution for compensating Copper deficiencies in reef...

  • Reef Delete ITC V1.02 - Sterilize Aiptasia and Other Pests
    $399.99
    No reviews

    Reef Delete is the ultimate reefing tool for pest and aquarium maintenance - Whether its destroying Aiptasia, Algaes or Flatworms...

  • Seachem ParaGuard - 500 mL / 17 fl. oz.
    $12.14 $15.18
    No reviews

    ParaGuard is the only fish and filter safe aldehyde based (10% by weight) parasite control product available (for parasites on...

  • Coral Rx One Shot Coral Dip - Single Shot Dosage
    $2.39 $2.99
    No reviews

    Most reef tank owners do not have access to well designed quarantine systems as they are expensive and time consuming....

  • Hikari Prazipro 4oz
    $15.49
    No reviews

    NOTE: Picture show is of 16oz bottle, this is the 4oz bottle.   The World’s First Ready-To-Use, Liquid Concentrate Praziquantel...

  • Brightwell Aquatics Replenish - Liquid Trace & Minor Mineral
    $17.44
    No reviews

    Overview Unique complex that replaces trace and minorelements used by fishes, corals, and other invertebrates, and which are lost through...

  • Brightwell Aquatics Boost pH+ 500ml
    $13.92
    No reviews

    Boost pH+ High Range pH Increaser deals with excess CO2, raises pH only without increasing alkalinity or calcium (in tanks...

  • ME Coral Magnesium Powder (makes 1 gal)
    $21.59 $26.99
    No reviews

    MECoral Magnesium (Mg)  powder is pre-measured to make a gallon liquid solution when mixed with RODI water.  MECoral uses only...

  • Red Sea Reef Foundation C (Mg) - 1kg Dry
    $33.99
    No reviews

    Reef Foundation C A magnesium complex for balanced formation of coral skeletons Mg   Calcium, magnesium, strontium and carbonate are...

  • Seachem Reef Adv. Magnesium 600 g / 1.3 lbs
    $8.43 $10.54
    No reviews

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

  • Seachem Reef Advantage Calcium 1 Kg.
    $21.81 $27.26
    No reviews

    Reef Advantage™is equivalent to dry Reef Complete™.It is a buffered (pH 8.3–8.6) optimized blend of ionic calcium, magnesium, strontium, sodium,...

  • B-IONIC Magnesium 32 Fl.oz
    $15.99 $19.99
    No reviews

    B-Ionic Magnesium Through the chemical process known as "ion-pairing", magnesium ion concentration influences the saturation point for calcium carbonate in...

  • Brightwell Aquatics Magnesion - Liquid Magnesium Supplement
    $8.14
    No reviews

    Overview: Highly-concentrated ionic magnesium solution. Provides magnesium, which helps regulate the balance between calcium and carbonates in aquarium water, and...

  • Hydrospace PNS HomeGro (grow your own live Probio 2.5 gal)
    $145.99
    No reviews

    PNS HomeGro Big Savings on Mass Quantities of Natural Live Bacterioplankton: Provide superior nutrition, while controlling nutrients and organic wastes,...

  • Brightwell Aquatics NeoNitro - 2L
    $31.56

    OUT OF STOCK

    No reviews

    Overview Used in conjunction with MICROBACTER7 and REEF BIOFUEL or KATALYST, enables natural phosphorus uptake to take place in systems...

  • Fauna Marin DINO X 250 ml
    $32.99
    No reviews

    Fight Against Gold Algae and Dinoflagellates Infections DINO X is a liquid algicide that fights against gold algae and other...

  • Blue Life USA Flux Rx 100gal/2000mg
    $22.92 $28.65
    No reviews

    Flux RxTM is simple and effective with levels easily achieved and maintained quickly for effectiveness when Bryopsis or Green Hair...

  • Seachem Pristine - 500 mL / 17 fl. oz.
    $15.70 $19.62
    No reviews

    Pristine Product Description Pristine uses bio-augmentation, a non-chemical and natural method, to improve water quality. It provides bacteria that break...

  • Blue Life Safety Stop - Instant Quarantine
    $4.51 $5.64
    No reviews

    Safety Stop is a simple and effective way to help protect your Saltwater and Freshwater aquarium fish from serious unwanted...

  • Red Sea NO3:PO4-X Nitrate & Phosphate reducer 500ml
    $24.99
    No reviews

    Red Sea NO3: PO4-X is a unique complex of carbons that are used by nutrient reducing bacteria. Each carbon in...

  • Seachem Purigen 250 ML
    $14.17 $17.71
    No reviews

    Purigen® is a premium synthetic adsorbent that is unlike any other filtration product. It is not a mixture of ion...

  • Phosphat-E Liquid Phosphate Remover 17oz
    $45.95
    No reviews

    Phosphat-E Liquid Phosphate Remover 17oz

  • Copper Power Blue 1 Gallon
    $99.99

    OUT OF STOCK

    No reviews

    COPPER POWER has been a preferred choice for marine fish enthusiasts fish stores, and aquariums since 1984. We are happy...

  • ME Coral Nitrate 32 oz
    $15.99 $19.99
    No reviews

    ME Nitrate (NO3) is designed to raise nitrates in Low Nutrient systems.  Some systems can become Nitrate (NO3) depleted which...

  • Two Little Fishes AcroPower Amino Acids for SPS corals - 500ml
    $22.70
    No reviews

    Two Little Fishes AcroPower Amino Acids for SPS corals - 500 AcroPower supplies amino acids that corals need to build...

  • Brightwell Aquatics Restor - Liquid Coral Tissue Nutritional
    $12.39
    No reviews

    Overview Encourages health, growth, reproduction, and vibrant coloration. Provides important nutrients to corals and their allies during periods of stress...

  • Brightwell Aquatics CoralAmino - Free Form Amino Acid Supplement - 60ml
    $30.94
    No reviews

    Overview: Complex of free-form amino acids in the same ratios found within tissues of stony corals. Beneficial to all corals...

  • Fauna Marin ELEMENTALS TRACE Co - Cobalt 250ml
    $27.49
    No reviews

    Highly Concentrated Cobalt Fauna Marin Elementals Trace Co is a high purity Cobalt solution for compensating Cobalt deficiencies in reef...

  • Fauna Marin ELEMENTALS N - Nitrogen 1000 ml
    $38.49
    No reviews

    Highly Concentrated Nitrogen Fauna Marin Elementals N is a highly concentrated Nitrogen solution for compensating Nitrogen deficiencies in reef aquariums....

  • Fauna Marin ELEMENTALS P - Phosphate 1000 ml
    $38.49
    No reviews

    Highly Concentrated Phosphate Fauna Marin Elementals P is a high purity Phosphate solution for compensating Phosphate deficiencies in reef aquariums. ...

  • Fauna Marin Multi Elements B Trace Element Complex 1000 ml
    $49.49
    No reviews

    Multi Elements B - Trace Element Solution for Calcium Reactor Users Multi Elements B contains substances and compounds essential for...

  • Fauna Marin Multi Elements A Trace Element Complex 1000 ml
    $49.49
    No reviews

    Multi Elements A - Trace Element Solution for Calcium Reactor Users Multi Elements A contains the elements responsible for coral...

  • Triton Iodine 100ml
    $32.00

    OUT OF STOCK

    No reviews

    Iodine trace element seawater supplement. Beneficial for metabolic processes in reef aquaria. Promotes health of algae and SPS coral. Iodine...

  • Triton Nickel 100ml
    $32.00

    OUT OF STOCK

    No reviews

    Nickel trace element seawater supplement. Beneficial for SPS/LPS coral colour and health. Nickel trace element seawater supplement. Beneficial for SPS/LPS...

  • ME Coral Phosphate PO4 2 oz
    $15.99 $19.99
    No reviews

    ME Coral concentrated Phosphate is a high purity and highly concentrated additive for the advanced reefer looking to increase Phosphates. ...

  • ATI Nutrition N - 500 mL
    $19.95
    No reviews

    Control nutrients naturally Nitrate and Phosphate frequently get out of balance and the results are high levels of one and...

  • ATI Elements - Molybdenum 100ml
    $18.95
    No reviews

    ATI Elements ATI Elements give you complete control to fine tune the amounts of trace minerals your aquarium needs. With...