ADDITIVES (434)
Best selling Best selling
  • ESV B-Ionic Calcium Buffer System - Two 1 Gallon Jugs (alk + calcium)
    $31.19 $38.99
    No reviews

    B-Ionic Calcium Buffer is the original, unique, easy to use, two-component liquid supplement system, which does not contain any organic...

  • Seachem KanaPlex - 5 g / 0.2 oz
    $6.51 $8.14
    No reviews

    KanaPlex is a blended kanamycin based medication that safely and effectively treats several fungal, and bacterial fish diseases (dropsy, popeye,...

  • Esv B-IONIC Magnesium 1 Gallon
    $28.79 $35.99
    No reviews

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

  • Hydrospace PNS Probio 16oz
    $23.79 $27.99
    No reviews

    PNS ProBio The Natural Live Aquarium Food that Cleans Up After Itself: Provide superior nutrition, while controlling nutrients and organic...

  • ESV 1 Gallon Alkalinity
    $17.59 $21.99
    No reviews

    NOTE: This is component 1, ALK only B-Ionic Calcium Buffer is the original, unique, easy to use, two-component liquid supplement...

  • ReefHD Reef Flux Fluconazole Treatment
    $14.99
    No reviews

    Reef Flux Reef Flux is a fluconazole aquarium treatment that is effective against certain fungal fish infections. To avoid unintended...

  • Hydrospace PNS Deep Cycle 16oz
    $28.89 $33.99
    No reviews

    PNS Deep Cycle             A Functional Cohort of Real Reef Bacteria: Restore key anaerobic microbial genera...

  • Red Sea NO3:PO4-X Nitrate & Phosphate reducer 1 liter
    $32.55 $36.99
    No reviews

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

  • Brightwell Aquatics Microbacter 7 - 1 Liter
    $28.10 $37.46
    No reviews

    MicroBacter7 Complete Bioculture for Establishing Biological Filtration & Rapidly Improving Water Quality in all Marine & Freshwater Aquaria Overview: -Complex...

  • Brightwell Aquatics MicroBacter7 - Complete Bioculture for M 250ml
    $9.29 $12.39
    No reviews

    Overview: • Complex system of non-pathogenic aerobic and anaerobic microbes, as well as natural enzymes, specifically formulated to establish biological...

  • Seachem MetroPlex - 5 g / 0.2 oz
    $6.51 $8.14
    No reviews

    MetroPlex is an effective and safe treatment for several protozoan and anaerobic bacterial diseases of fish (Cryptocaryon, Hexamita, Ichthyophthirius). It...

  • Seachem Focus - 5 g / 0.2 oz
    $6.51 $8.14
    No reviews

    Focus is an antibacterial polymer for internal infections of fish. Focus is primarily intended to be mixed with food and/or...

  • Seachem Prime 250 ML
    $7.87 $9.84
    No reviews

    Prime™ is a complete conditioner for both marine and freshwater use that removes chlorine, chloramine, and detoxifies ammonia and nitrite....

  • SEA LAB FORMULA #28 - 1 KILO BLOCK
    $23.99 $29.99

    OUT OF STOCK

    No reviews

    ONE HUGE BLOCK -GREAT FOR LARGER TANKS Sea-Lab Formula 28 is a mixture of naturally occurring buffer compounds that maintains...

  • Frank's Tanks F-Aiptasia Killer, 1oz
    $13.99
    No reviews

    Please stir this product with the stirring stick that is included and then shake vigorously upon receiving it and before...

  • Brightwell Aquatics Lugol's Solution - Advanced Iodine for R
    $14.93 $19.90
    No reviews

    Overview: Brightwell Aquatics LUGOL'S is an extremely powerful iodine solution. It should only be used by advanced reef aquarists to...

  • Two Little Fishies ReVive Coral Cleaner 16.8oz (500ml)
    $10.32 $12.90
    No reviews

    Two Little Fishies ReVive Coral Cleaner is a new product developed by Julian Sprung for cleansing live stony corals. It...

  • Coral Rx Pro 1oz - makes 17 gallons
    $19.59 $24.49
    No reviews

    Coral Rx was developed in 2006 for two purposes: to treat corals suffering with parasites, and as a prophylactic measure...

  • Seachem Reef Fusion 2 - 2 Part Alkalinity - 4L
    $26.38 $32.98
    No reviews

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

  • ESV 1 Gallon Calcium
    $17.59 $21.99
    No reviews

    NOTE: This is component 2, CALCIUM only B-Ionic Calcium Buffer is the original, unique, easy to use, two-component liquid supplement...

  • Brightwell MicroBacterSTARTXLM - Professional 15X Strong Nitrifying Tank Starter Bacteria Culture - 250 ml /8.5 fl. oz.
    $19.98 $26.64
    No reviews

    Professional 15x strength powerful live tank starter nitrifying bioculture, with much fewer temperature and shelf life restrictions than competing products,...

  • Brightwell Aquatics MicroBacter7 - Complete Bioculture for M 500ml
    $16.89 $22.52
    No reviews

    MicroBacter7 Complete Bioculture for Establishing Biological Filtration & Rapidly Improving Water Quality in all Marine & Freshwater Aquaria Overview: -Complex...

  • ESV B-Ionic Transition Elements - 32oz
    $19.99 $24.99
    No reviews

    B-Ionic Transition Elements   B-Ionic Transition Elements is the latest product by ESV, formulated by Bob Stark in collaboration with...

  • Brightwell Aquatics Magnesion - Liquid Magnesium Supplement - 2L
    $22.22 $29.63
    No reviews

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

  • Brightwell MicroBacter Purple M - 500 ml
    $17.90 $23.86

    OUT OF STOCK

    No reviews

    Live Beneficial Bacteria – Advanced Purple Non-Sulfur Bacteria (PNSB) supplement that enhances natural nutrient cycling, supports biological filtration, and improves...

  • Seachem Reef Fusion 1 - 2 Part Calcium - 4L
    $26.38 $32.98
    No reviews

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

  • Seachem Prime 500 mL / 17 fl. oz. l
    $14.95 $18.69
    No reviews

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

  • Boyd's Chemi-Clean 2 gram size (blue box) (16714-6)
    $14.39 $17.99
    No reviews

    Chemi-clean removes red, black, blue-green and methane (bubble) producing algae from marine aquariums. It's completely safe for use in all...

  • EcoSystem Aquarium Miracle Mud - 10 lbs - SALTWATER
    $47.99 $59.99
    No reviews

    Miracle Mud is a product of EcoSystem Aquarium. Miracle Mud is comprised of up to 80% oceanic mud, harvested from...

  • Esv Kalkwasser 3.5 Pounds
    $19.99 $26.99
    No reviews

    Calcium Hydroxide (Kalkwasser Powder)   Calcium Hydroxide is a proven standard for maintaining calcium concentration and alkalinity in closed marine...

  • Joe's Juice 20ML
    $8.99
    No reviews

    JoesJuice is an easy to use Reef safe product that will kill Aiptasia and Majano anemones. Simply feed the problem...

  • Brightwell MicroBacter Purple M - 1 Liter
    $30.14 $40.18

    OUT OF STOCK

    No reviews

    Live Beneficial Bacteria – Advanced Purple Non-Sulfur Bacteria (PNSB) supplement that enhances natural nutrient cycling, supports biological filtration, and improves...

  • PolypLab Polyp-Booster 100mL
    $16.79 $23.99
    No reviews

      With the introduction of Polyp-Booster, we are proud to say that we have outdone ourselves. Based on Reef-Roids' proven...

  • Two Little Fishes AcroPower Amino Acids for SPS corals - 1000
    $29.17 $36.46
    No reviews

    AcroPower Amino Acid Formula for SPS Corals AcroPower supplies amino acids that corals need to build their skeletal architecture. Like...

  • Brightwell Aquatics MicroBacter7 - Complete Bioculture for M - 2 litres
    $46.35 $61.80
    No reviews

    MicroBacter7 Complete Bioculture for Establishing Biological Filtration & Rapidly Improving Water Quality in all Marine & Freshwater Aquaria Overview: -Complex...

  • MISC-ITEM
    $22.00 $180.00
    No reviews

  • Brightwell Aquatics NeoPhos - 500 ml
    $9.93 $13.24
    No reviews

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

  • Brightwell Aquatics MicroBacter Clean 500ml
    $17.90 $23.86
    No reviews

    Microbial culture & enzyme blend designed to target and clean surfaces of live rock and more Overview Complex system of...

  • Blue Life USA Safety Stop - Instant Quarantine - 3 PACK
    $13.54 $16.92
    No reviews

    Includes 3 Single Packs Safety Stop is a simple and effective way to help protect your Saltwater and Freshwater aquarium...

  • Boyd's Chemi-Clean 6 gram size (red box) (76714-8)
    $26.57 $33.21
    No reviews

    Chemi-clean removes red, black, blue-green and methane (bubble) producing algae from marine aquariums. It's completely safe for use in all...

  • Phosphat-E Liquid Phosphate Remover 8.5 oz
    $22.16 $29.54
    No reviews

    Overview: Begins to eliminate reactive phosphate immediately upon addition to aquarium. Safe for all inhabitants of reef and marine fish-only...

  • Fauna Marin ELEMENTALS TRACE Zn - Zinc 250ml
    $21.99 $27.49
    No reviews

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

  • ESV B-Ionic Nitrate 32 fl. oz.
    $15.99 $19.99
    No reviews

    We are proud to introduce B-Ionic Nitrate which is a concentrated source of nitrate in the form of a highly...

  • Red Sea Reef Colors D (Trace) 500ml
    $18.47 $20.99
    No reviews

    Coral Colors D A trace element complex that promotes the Purple/Blue colors in corals Bioactive trace elements   Coral Colors...

  • Red Sea Reef Colors B (Potassium) 500ml
    $18.47 $20.99

    OUT OF STOCK

    No reviews

    Coral Colors B Potassium complex that promote the Red colors in corals K & Trace elements   Coral Colors B...

  • SEA LAB FORMULA #28 - BOX OF 24 BLOCKS
    $23.99 $29.99
    No reviews

    Box of 24 Cubes Sea-Lab Formula 28 is a mixture of naturally occurring buffer compounds that maintains natural ocean concentrations...

  • Frank's Tanks F-Aiptasia Killer, 2oz
    $24.99
    No reviews

    Please stir this product with the stirring stick that is included and then shake vigorously upon receiving it and before...

  • Ultralife Red Slime Stain Remover, .71 Oz (treats 300 gallons)
    $13.56 $16.95
    No reviews

    Previously know as the Ultralife Red Slime Remover, new packaging-same great product! Ultralife Red Slime Stain Remover is a revolutionary...

  • PolypLab Medic 30ml Reef Safe Fish Mediciation
    $27.99 $39.99
    No reviews

    What is Medic? Medic is a highly effective water conditioner used to de-pollute water in both marine and freshwater environments....

  • Blue Life USA Aiptasia Rx
    $10.10 $12.62
    No reviews

      Benefits: Aiptasia Control is a simple, Veterinarian approved, and quick solution for controlling aiptasia and other nuisance anemones. This...

  • Brightwell Aquatics NeoNitro - 500 ml
    $9.93 $13.24
    No reviews

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

  • Brightwell MicroBacter QuikCycl Ammonia nutrient for fishless cycle - 60 ml / 2 oz
    $3.17 $4.23
    No reviews

    Professional nutrients for fishless cycling and establishing strong nitrifying bacteria beds in freshwater and marine aquariums Overview READ ALL BEFORE...