ADDITIVES (469)
Best selling Best selling
  • Copper Power Blue for Saltwater - 1 gal
    $109.99
    No reviews

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

  • Fauna Marin Color Elements Red/Purple Complex 250ml
    $18.01 $23.09

    OUT OF STOCK

    No reviews

    Color Elements Red/Purple Complex - Enhanced Coral Growth and Coloration Introducing a novel blend of trace elements that enhance growth...

  • Fauna Marin Amin 500 ml
    $54.05 $69.29

    OUT OF STOCK

    No reviews

    Accelerate Coral Growth and Improve Color Pigmentation  Fauna Marin Amin is an amino acid product that accelerates coral growth and...

  • Fauna Marin Amin 250 ml
    $36.03 $46.19
    No reviews

    Accelerate Coral Growth and Improve Color Pigmentation  Fauna Marin Amin is an amino acid product that accelerates coral growth and...

  • PolypLab Acids 50ml
    $18.00 $29.00
    No reviews

    III. RF-Acids Concentrated fusion of select amino acids The role of amino acids becomes critical in a low nutrient environment....

  • Brightwell Aquatics Koralle-VM - Vitamin & Mineral Supplemen
    $15.50 $18.24
    No reviews

    Overview: Unique vitamin and minor and trace element complex for establishing and replacing substances important to marine invertebrates, including corals,...

  • Triton Sulphate Dry 1000G
    $42.00
    No reviews

    Sulphate macro element seawater supplement. Sulphate is an important element that naturally occurs in seawater. Beneficial for SPS/LPS coral colour...

  • Triton Boron 1000ml
    $16.00 $32.00
    No reviews

    Boron macro element seawater supplement. Boron is an important element that naturally occurs in seawater. Stabilizes pH, beneficial for SPS/LPS...

  • Triton Bromide 1000ml
    $22.50 $45.00
    No reviews

    Bromine macro element seawater supplement. Bromine is an important element that naturally occurs in seawater. Beneficial for SPS/LPS coral colour...

  • ME Coral Phosphate PO4 2 oz
    $16.99 $19.99
    No reviews

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

  • ME Coral Strontium 2 oz
    $16.99 $19.99
    No reviews

    ME Strontium concentrate is a pharma grade highly concentrated easy to add additive.  Strontium has been shown to be instrumental...

  • ATI Nutrition P - 500 mL
    $29.95
    No reviews

    ATI Nutrition P delivers a high-quality phosphate and phosphorus source designed to balance phosphate (PO4) and nitrate (NO3) nutrient levels...

  • ME Coral Potassium 32 oz
    $16.99 $19.99
    No reviews

    ME Coral Potassium (K) is a Pharmaceutical grade liquid Potassium for supplementing Aquarium Seawater.  Potassium depletion can affect coral coloration...

  • ATI Elements - Chromium 100ml
    $13.27 $18.95
    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+ 8oz
    $12.74 $14.99
    No reviews

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

  • Seachem Replenish - 250 mL / 8.5 fl. oz.
    $3.17
    No reviews

    Replenish Product Description Replenish is a proprietary blend of salts designed to replenish physiologically relevant minerals that are removed by...

  • Triton Core7 Reef Supplements 3.8L (1 Gallon) Complete Set
    $159.00
    No reviews

    Included: 4 x 1 gal jugs.  Part 1, Part 2, Part 3a and Part 3B.   For other Reef Methods. ...

  • Fauna Marin Balling Salts Kh 1 kg
    $15.30 $19.62
    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 1 kg
    $15.30 $19.62
    No reviews

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

  • Blue Life USA Reef Rx (Coral Rx)
    $20.27 $23.85
    No reviews

    Anti-Bacterial Treatment for Corals Ideal for Freshly Cut Coral Frags Safe for All Coral Types Reef Safe Will Not Harm...

  • ME Coral Wash Off Coral Dip 4X 2 oz
    $12.74 $14.99
    No reviews

    Wash Off is a powerful Coral Cleaner for newly acquired corals such as Sps, Lps, Chalice, Zoas, Montipora, Mushrooms and...

  • Mini Majano Wand Aiptasia & Majano Eliminator
    $142.79 $167.99
    No reviews

    So Easy, It's Like Magic. The Majano Wand is an easy and effective tool for ridding your tank of pesky...

  • API EM Erythromycin Medication - 10ct Powder Packets
    $17.88

    OUT OF STOCK

    No reviews

    For broad spectrum treatment and control of bacterial disease, such as body slime, mouth fungus, Furunculosis (open lesions and swelling),...

  • Brightwell Aquatics Potassion - Concentrated Potassium Solution - 2 Liter
    $44.47 $52.32
    No reviews

    Overview • Highly-concentrated ionic potassium solution. • Provides potassium, an important component of aragonite (the mineral secreted as skeletal material...

  • Triton Magnesium 5000ml
    $82.50 $165.00
    No reviews

    Magnesium macro element seawater supplement. Magnesium is an important element that naturally occurs in seawater. Essential for calcification of SPS/LPS...

  • Brightwell Aquatics Boost pH+ - 1L
    $22.87 $26.91
    No reviews

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

  • Red Sea Reef Foundation A (Ca/Sr) - 5 Liter Jug
    $119.99
    No reviews

    CALCIUM+ SUPPLEMENT FOUNDATION A Calcium and strontium complex for balanced formation of the coral skeleton Ca | Sr | Ba...

  • ME Coral 32 OZ Alkalinity Liquid
    $12.74 $14.99
    No reviews

    MECoral 32 oz Kh liquid solution is ready to use.  MECoral uses only Pharmaceutical Grade raw material to achieve the...

  • ATI Elements - Magnesium 1000ml
    $13.97 $19.95
    No reviews

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

  • Two Little Fishes Magnesium Concentrate 500 mL (16.8 fl oz)
    $8.58 $10.09
    No reviews

    Two Little Fishies Magnesium Concentrate is a solution that contains the element magnesium, an essential pH-stabilizing component of the seawater...

  • 1317, Reef Buffer 1KG
    $23.62
    No reviews

    Reef Buffer is intended primarily for use in a reef system where the maintenance of a pH of 8.3 is...

  • Seachem Reef Adv. Calcium 250 g / 8.8 oz
    $9.17
    No reviews

    Reef Advantage Calcium" is a non-caustic (pH 8.3—8.6) optimized blend of ionic calcium designed to restore and maintain calcium to...

  • Seachem Reef Fusion 2 - 2 Part Alkalinity - 500 mL
    $9.10
    No reviews

    Reef Fusion two part system   Reef Fusion 1™ and Reef Fusion 2™ are the foundation of a system formulated...

  • Fauna Marin VIB X Marine 140g
    $22.51 $28.86
    No reviews

    Stabilize the Microbiome with Fauna Marin VIB X Marine Using Fauna Marin VIB X, you can restore the natural balance...

  • Fauna Marin ReBiotic 100% Natural 125 g
    $64.86 $83.15
    No reviews

    Restore Bacterial Stability in Saltwater Aquariums Fauna Marin Rebiotic 100% Natural is a unique freeze-fried bacteria mix used for restoring...

  • Boyd ChemiClean Liquid 2oz bottle - Treats up to 720 Gallons
    $24.55 $28.88
    No reviews

    THE BENEFITS OF USING CHEMICLEAN: Cleans many types of stains from cyanobacteria Works in fresh and salt water Completely safe...

  • Triton CYA-NO
    $28.00

    OUT OF STOCK

    No reviews

    CYA-NO is a cyanobacteria inhibitor. Derived through TRITON’s unique scientific work in N-DOC lab testing and establishing the TRITON N:C:P...

  • Triton RTN-X
    $32.00
    No reviews

    RTN-X is a rapid tissue necrosis inhibitor. Derived through TRITON’s unique scientific work in N-DOC lab testing and establishing the...

  • Brightwell Aquatics Razor Marine, Systemic Cleaner, coral safe 250ml
    $11.09 $13.05
    No reviews

    Razor Marine Unique Marine Systemic System Cleaner designed to target and clean surfaces of live rock, coral decorations and tank...

  • Brightwell ChaetoGro - 2 L / 67.6 fl. oz.
    $46.16 $54.30
    No reviews

    ChaetoGro Complete phosphate and nitrate free multi-nutrient with iron, cobalt and molybdenum for chaetomorpha growth and vigor in all marine...

  • Brightwell Aquatics Reef BioFuel - Enhances Nutrient Uptake
    $55.69 $65.52
    No reviews

    Overview • Helps maintain a balanced nutrient-limited marine aquarium by enabling the hobbyist to enhance the rate of microbial growth...

  • DrTim's Reef Eco-Balance (480ml - 480 gal)
    $21.84 $25.69
    No reviews

    Probiotics for Core System Health Use DrTim’s Eco-Balance Probiotic Bacteria to Promote Optimal Water Quality Eco-Balance Multi-Strained Probiotic Bacteria helps...

  • DrTim's Reef Clear-Up (960ml - Treats 1920 gal)
    $46.91 $55.19
    No reviews

    Treat Cloudy Aquarium Water Use DrTim’s Clear-UP Natural Water Clarifier to Clear Up Your Tank Clear-UP Natural Water Clarifier helps:...

  • DrTim's Reef Clear-Up (120ml - Treats 240 gal)
    $12.49 $14.69
    No reviews

    Treat Cloudy Aquarium Water Use DrTim’s Clear-UP Natural Water Clarifier to Clear Up Your Tank Clear-UP Natural Water Clarifier helps:...

  • DrTim's Reef One & Only (480ml - Treats 240 gal)
    $104.20 $122.59
    No reviews

    Treat Aquarium Nitrite & Ammonia Levels Use DrTim’s One & Only Live Nitrifying Bacteria to Eliminate New Tank Syndrome One...

  • DrTim's Reef One & Only (120ml - Treats 60 gal)
    $34.50 $40.59
    No reviews

    Treat Aquarium Nitrite & Ammonia Levels Use DrTim’s One & Only Live Nitrifying Bacteria to Eliminate New Tank Syndrome One...

  • DrTim's Saltwater Waste-Away (480ml - Treats 480gal)
    $27.02 $31.79
    No reviews

    Natural Aquarium Cleaner Use DrTim’s Waste-Away Sludge Busting Bacteria to Remove Hidden Wastes Waste-Away is sludge busting bacteria!   Dissolves...

  • DrTim's Saltwater One & Only (120ml - Treats 60gal)
    $34.50 $40.59
    No reviews

    Treat Aquarium Nitrite & Ammonia Levels Use DrTim’s One & Only Live Nitrifying Bacteria to Eliminate New Tank Syndrome One...

  • ASF Reef Shots Probiotics - 24 shots
    $16.99 $19.99
    No reviews

    Reef Shot Probiotics :   The normal processes in an aquarium cause the system to become unbalanced, allowing unfriendly bacteria...

  • ASF Reef Shots Vitamins - 24 shots
    $15.73 $18.50
    No reviews

    Reef Shot Vitamins :   Vitamins Reef Shot contains a mixture of vitamins and immunostimulants that work together to help...

  • ASF Reef Shots Coraline Booster - 24 shots
    $12.33 $14.50
    No reviews

    Reef Shot Coralline Booster :   Coralline Booster Reef Shot is a solution of substances intended to promote the synthesis...