ADDITIVES (469)
Best selling Best selling
  • ME Coral Kalk Powder ( 1/2 GAL container)
    $13.59 $15.99
    No reviews

    Kalkwasser (Kalk) is also known as Lime or Calcium Hydroxide. It is the only chemical that delivers both Calcium and...

  • ME Coral Magnesium Powder (makes 1/2 gal)
    $13.59 $15.99
    No reviews

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

  • ME Coral Alkalinity Powder (makes 4 gal)
    $28.89 $33.99
    No reviews

    MECoral Kh powder is pre-measured to make a 4 gallon liquid solution when mixed with your RODI water.   MECoral uses...

  • ME Coral Calcium Powder (makes 4 gal)
    $28.89 $33.99
    No reviews

    MECoral Calcium (Ca) powder is premeasured  to make a 4 gallon liquid solution when mixed with your RODI water.   MECoral...

  • ME Coral Alkalinity Liquid- Gallon
    $28.04 $32.99
    No reviews

    MECoral 1 gallon Kh liquid solution is ready to use.  MECoral uses only Pharmaceutical Grade raw material to achieve the...

  • ME Coral 32 Oz Calcium Liquid
    $12.74 $14.99
    No reviews

    MECoral 32oz Calcium (Ca) is ready to use.  MECoral uses only Pharmaceutical grade ingredients to achieve the highest quality, highest...

  • ATI Elements - Calcium 1000ml
    $16.07 $22.95
    No reviews

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

  • Two Little Fishies C Balance - 64oz (2 x 32)
    $26.15 $30.77
    No reviews

    C-Balance A two-part solution for replenishing calcium and alkalinity. Adjusts calcium, magnesium and strontium ions to Natural Seawater ratios, and...

  • PolypLab Nano One - 250ml
    $14.99
    No reviews

    One is a revolutionary calcium supplement for reef aquariums containing balanced levels of calcium, alkalinity and magnesium. It is a...

  • Seachem Reef Kalkwasser 500 g / 1.1 lbs
    $15.94
    No reviews

    Reef Kalkwasser"is a pure calcium hydroxide with unsurpassed purity and solubility characteristics. Calcium hydroxide is used to prepare limewater (kalkwasser)...

  • Seachem Marine Buffer 1KG
    $23.62
    No reviews

    Marine Buffer™is the original and still unique buffer with a pK of 8.3, designed to adjust pH to 8.3 and...

  • Fauna Marin VIB X Marine 700g
    $90.08 $115.49
    No reviews

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

  • Brightwell Aquatics RedoxIclean - 500 ml
    $16.18 $19.04
    No reviews

    Immediately Improves Water Quality in all Reef, Marine and Freshwater Aquaria   Overview Immediately improves water quality in all manner...

  • Fauna Marin RED X 500 ml
    $45.04 $57.74
    No reviews

    Prevent Unsightly Cyanobacteria Growth in Reef Aquariums Fauna Marin RED X organically prevents algae growth in reef aquariums. It is...

  • Fauna Marin Bacto Energy 250 ml
    $36.03 $46.19
    No reviews

    Supports Nutrient-Reducing Bacteria for Reef Aquariums Fauna Marin Bacto Energy is a special carbon source that feeds nutrient-reducing bacteria in...

  • Blue Life USA CLEAR FX Reef 225ml
    $19.13 $22.50
    No reviews

    Blue Life USA CLEAR FX Reef 225ml All-in-one filter bag Removes Algae Feeding Organics Polishes Water Crystal Clear Easy to...

  • Prodibio BioClean SW 6/vials
    $18.79 $22.10
    No reviews

    Take Care of Your Aquarium's Bacteria   Combines Prodibio BioDigest and Bioptim Naturally Reduces Nitrates and Phosphates Suitable for Freshwater...

  • Seachem Stability - 100 mL / 3.4 fl. oz.
    $4.44
    No reviews

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

  • Seachem Prime 2 L / 67.6 fl. oz.L
    $58.61
    No reviews

    Prime" is the complete and concentrated conditioner for both fresh and salt water. Prime" removes chlorine, chloramine and ammonia. Prime"...

  • Prodibio BioKit Reef Nano
    $43.39 $51.05

    OUT OF STOCK

    No reviews

    A Comprehensive Bacteria Maintenance Kit for Reef Aquariums   Combines Prodibio BioDigest, Bioptim, Reef Booster, Coral Color Booster, Coral Vits,...

  • ASF Reef Shots Alkalinity (24 shots = 16oz)
    $16.99 $19.99
    No reviews

    Reef Shots Alkalinity (24 shots = 16oz)

  • DrTim's Reef Waste-Away (240ml - Treats 240 gal)
    $18.35 $21.59
    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 Reef Waste-Away (120ml - Treats 120 gal)
    $11.47 $13.49
    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 Reef Eco-Balance (240ml - Treats 240 gal)
    $16.14 $18.99
    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 Eco-Balance (120ml - Treats 120 gal)
    $10.28 $12.09
    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 Marine Waste-Away Gel LG - Single
    $20.65 $24.29
    No reviews

    DrTim’s Aquatics Waste-Away Time Release Gels The gels are full of our Waste-Away Bacteria that are automatically and continuously released...

  • DrTim's Marine Waste-Away Gel MD - Single
    $15.63 $18.39
    No reviews

    DrTim’s Aquatics Waste-Away Time Release Gels The gels are full of our Waste-Away Bacteria that are automatically and continuously released...

  • DrTim's Marine Waste-Away Gel SM - Single
    $10.70 $12.59
    No reviews

    DrTim’s Aquatics Waste-Away Time Release Gels The gels are full of our Waste-Away Bacteria that are automatically and continuously released...

  • DrTim's Reef Clear-Up (3785ml - Treats 7680 gal)
    $130.72 $153.79
    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 (1920ml - Treats 3840 gal)
    $73.86 $86.89
    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 (480ml - Treats 960 gal)
    $33.57 $39.49
    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 (240ml - Treats 480 gal)
    $21.33 $25.09
    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 First Defense (240ml - Treats 480 gal)
    $18.10 $21.29
    No reviews

    Stress Relief & Immune Support Use DrTim’s First Defense to Promote Healing and Repair Wounds in Your Tank First Defense...

  • DrTim's Reef First Defense (120ml - Treats 240 gal)
    $10.87 $12.79
    No reviews

    Stress Relief & Immune Support Use DrTim’s First Defense to Promote Healing and Repair Wounds in Your Tank First Defense...

  • DrTim's Reef One & Only (240ml - Treats 120 gal)
    $56.35 $66.29
    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 (120ml - Treats 120gal)
    $11.47 $13.49
    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 Re-Fresh (480ml - Treats 960gal)
    $52.35 $61.59
    No reviews

    Treat Brown/Green Aquarium Water Use DrTim’s Re-Fresh to Preserve Clean Water in Your Tank Re-Fresh for Brown/Green Water helps:   Revitalizes old,...

  • DrTim's Saltwater Re-Fresh (120ml - Treats 240gal)
    $17.76 $20.89
    No reviews

    Treat Brown/Green Aquarium Water Use DrTim’s Re-Fresh to Preserve Clean Water in Your Tank Re-Fresh for Brown/Green Water helps:  ...

  • DrTim's Saltwater First Defense (480ml Treats 960gal)
    $25.75 $30.29
    No reviews

    Stress Relief & Immune Support Use DrTim’s First Defense to Promote Healing and Repair Wounds in Your Tank First Defense...

  • DrTim's Saltwater First Defense (120ml - Treats 240gal)
    $10.87 $12.79
    No reviews

    Stress Relief & Immune Support Use DrTim’s First Defense to Promote Healing and Repair Wounds in Your Tank First Defense...

  • DrTim's Saltwater One & Only - 60ml - Treats 30 gal
    $19.46 $22.89
    No reviews

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

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

    Reef Shot Calcium :   Many reef organisms synthesise calcium and strontium to form shells or skeleton from the seawater. ...

  • ATI ICP Element Sulfur - 500 g
    $29.95
    No reviews

    ATI ICP Element Sulfur - 500 g ATI ICP Element Sulfur is a high-purity powdered supplement used to restore sulfur...

  • ATI ICP Element Magnesium - 1000 mL
    $29.95
    No reviews

    ATI ICP Element Magnesium - 1000 mL ATI ICP Element Magnesium is a high-purity solution designed to restore and maintain...

  • ATI ICP Element Lithium - 150 mL
    $19.95
    No reviews

    ATI ICP Element Lithium - 150 mL ATI ICP Element Lithium is a high-purity solution used to restore lithium levels...

  • ATI ICP Element Copper - 150 mL
    $19.95
    No reviews

    ATI ICP Element Copper - 150 mL ATI ICP Element Copper is a high-purity solution for restoring trace levels of...

  • ATI ICP Element Calcium - 1000 mL
    $29.95
    No reviews

    ATI ICP Element Calcium - 1000 mL ATI ICP Element Calcium is a high-purity, high-concentration solution used to restore and...

  • ATI ICP Element Bromine - 1000 mL
    $29.95
    No reviews

    ATI ICP Element Bromine - 1000 mL ATI ICP Element Bromine is a high-purity solution used to replenish bromine levels...

  • ATI ICP Element Alkalinity - 1000 mL
    $29.95
    No reviews

    ATI ICP Element Alkalinity - 1000 mL ATI ICP Element Alkalinity is a high-purity, high-concentration solution designed to restore and...

  • ATI Essentials SPS Reef #1 - 2.7 Liter
    $30.95
    No reviews

    ATI Essentials SPS Reef #1 - 2.7 Liter Part One (Alkalinity Complex) only of the ATI Essentials SPS two-part dosing...

  • ATI Essentials Mixed Reef #1 - 2.7 Liter
    $34.95
    No reviews

    ATI Essentials Mixed Reef #1 - 2.7 Liter Part One (Alkalinity Complex) only of the ATI Essentials Mixed Reef two-part...

  • Fauna Marin AEFW M - 1000ml
    $81.07 $103.94
    No reviews

    Fauna Marin AEFW M, 1000ml Fauna Marin AEFW M will boost Acropora corals' natural defenses and vitality with this specialized...