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Aquarium Water Tests & Treatment

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    Seachem
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    Fluval
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    Red Sea
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    Tétra
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    sera
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    JBL
  • Brightwell Aquatics
    Brightwell Aquatics

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Top rated

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  • API Freshwater Master Test Kit

    API Freshwater Master Test Kit

    (290)
    99% agree - Would recommend
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  • API LR8600 F/S Ammonia Watr Test

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    100% agree - Would recommend
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  • Mars Fishcare API Stress Coat - 1 Gallon

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    96% agree - Would recommend
    $59.95 New
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    API GH and KH Test Kit 58 317163010587

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    Seachem Safe Water Conditioner - 8.8 oz

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    100% agree - Would recommend
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  • Salifert Calcium Ca Test Kit 50 to 100 Tests

    Salifert Calcium Ca Test Kit 50 to 100 Tests

    (20)
    100% agree - Would recommend
    $20.99 New
  • Hikari Ich-x - 4 FL Oz Ahk73214

    Hikari Ich-x - 4 FL Oz Ahk73214

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    100% agree - Would recommend
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    API High Range Ph Test Kit 1 1/4 FL Oz. Aph27 Mars Fishcare

    (15)
    100% agree - Would recommend
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  • Seachem
  • sera
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Best selling

See All
  • API Freshwater Master Test Kit

    API Freshwater Master Test Kit

    (290)
    $11.00 New
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    Seachem 116043601 Water Conditioner - 5.3gal

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    $13.07 New
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    Hanna Marine Magnesium Checker - HI783

    (1)
    $62.24 New
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    API Saltwater Marine Master Aquarium Test Kit

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    Hanna HI-98319 Marine Waterproof Salinity Test Kit

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    $8.69 New
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  • Aquarium ph Test Kit
  • Aquarium Water
  • Aquarium Water Conditioner
  • Bacteria Testing
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Review highlights

Recommended by our customers
  • An excellent product!

    By NYzZ6LmiSPu@Deleted

    It worked like a miracle! I dearly wish that I had had it prior to my ich problem. It will now be a necessary item for ... see all reviews

    Verified Purchase

    Hikari Ich-X - 4 oz Treats Freshwater and Saltwater Fish

  • When I test my saltwater tank, I always use Salifert. I think it’s way better than Red Sea.

    By adragodrago2012

    When I test my saltwater tank, I always use Salifert. I think it’s way better than Red Sea. see all reviews

    Verified Purchase

    Salifert Calcium Test Kit- Free US Shipping

  • Good product, have been using API products for years.

    By 340rg

    Fast and easy to use test. see all reviews

    Verified Purchase

    API Aquarium Pharmaceuticals Fresh & Salt Water High Range PH Test Kit 160 Tests

  • API Fresh Water Test Kit

    By procraftjeff

    This test kit measure PH, Amonia, and water hardness. These kits sell for around 30 dollars at Petsmart, but you can fin... see all reviews

    Verified Purchase

    Aquarium Pharmaceuticals API Freshwater Liquid Master Test Kit

  • Stress Coat+ keeps my KOI in good health!

    By directshot1911

    My primary use for API Stress Coat+ is to maintain a healthy slime coat on my KOI. A good slime coat on KOI reduces the... see all reviews

    Verified Purchase

    Api Stress Coat+ 1 gal Removes Chlorine, Chloramine, Ammonia in Tap Water

  • Effective and long shelf life

    By catcatcatfish

    This is the only product I trust to accurately test my aquariums. Pros: -Extremely credible, pinpoints the exact amo... see all reviews

    Verified Purchase

    API Ammonia 130 test Kit

  • SeaChem Safe Water Conditioner

    By collectorjay1973

    I honestly believe all SeaChem Products are Top Of The Line when it comes to maintaining Aquariums. Before I discovered ... see all reviews

    Verified Purchase

    SeaChem Safe Water Conditioner 250g / 8.8 Oz

  • Reliable Test of KH & GH

    By 1st_taisho

    Easy to use test to stay on top of aquarium KH and GH levels. Fill the test tube to the level mark with aquarium water ... see all reviews

    Verified Purchase

    API GH & KH General & Carbonate Hardness Aquarium Test Kit

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    50 Grams Pure ACS/USP Grade Elemental I Prilled Prills 99.8% Min USA Seller

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    Brand New · API
    (290)
    $38.49
    Free shipping
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    Brand New · Unbranded
    $15.17
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    Brand New
    (15)
    $12.99
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    Seachem Stress Guard

    Brand New · Seachem
    (6)
    $8.99 to $20.99
    Free shipping
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    Seachem Flourish

    Brand New · Seachem
    (14)
    $8.69 to $73.59
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    API GH & KH Test Kit

    Brand New · API
    (47)
    $13.49
    Free shipping
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    FOR FISH AQUARIUM USE AQUA 500mg 100 SHIP FROM USA - FREE FAST SHIPPING

    Brand New
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  • MERYDI-7IN1-Aquarium Test Strips Fish Tank  PH Water Test Strips Kit Freshwater - Image 1 of 4

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    Brand New
    $10.59
    or Best Offer
    Free shipping
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  • API PH Up - Image 1 of 1

    API PH Up

    Brand New · API
    (1)
    $7.99 to $21.69
    Free shipping
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    Brand New · Seachem
    $11.99 to $26.99
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  • Seaoura SR-520 2in1 Aquarium Magnetic Cleaner with Digital Aquariums Thermometer - Image 1 of 4

    Seaoura SR-520 2in1 Aquarium Magnetic Cleaner with Digital Aquariums Thermometer

    Brand New
    $18.88
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  • 16-in-1 Water Test Strips for Drinking Water Aquarium Pond Fast 60s Results​ - Image 1 of 4

    16-in-1 Water Test Strips for Drinking Water Aquarium Pond Fast 60s Results​

    Brand New · Unbranded
    $7.69 to $18.99
    Free shipping
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  • Triton ICP-OES   4-PACK   Saltwater Test Kit for Reef Aquariums - Image 1 of 4

    Triton ICP-OES 4-PACK Saltwater Test Kit for Reef Aquariums

    Brand New
    $165.00
    or Best Offer
    Free shipping
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  • hanna instruments cooper checker - Image 1 of 3

    hanna instruments cooper checker

    Pre-Owned · Hanna
    $40.00
    Free shipping
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  • Seachem Laboratories Prime Ammonia Detoxifier (Each Sold Separately)* - Image 1 of 4

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  • API Freshwater Master Test Kit, Expires 02/2027 - UPC: 317163010341 - Image 1 of 1

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    Brand New · API
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    4d 16h
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  • Salifert Freshwater Potassium Test Kit - Image 1 of 1

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  • API Ammonia Test Kit - Image 1 of 1

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    Free shipping
    111 sold
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    $15.39 to $124.99
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  • Tap Water Conditioner Fish Aquarium API Super Strength 16 Fl Oz Bottles 2-Pack - Image 1 of 4

    Tap Water Conditioner Fish Aquarium API Super Strength 16 Fl Oz Bottles 2-Pack

    Brand New · API
    $19.95
    Free shipping
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  • Reefing Concepts Hanna Test Kit Organizer (Organizer Only) SALTWATER  - Image 1 of 1

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    Brand New · Hanna
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    Brand New
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    Brand New · Unbranded
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    HI702-25 Copper High Range Checker® Reagents (25 Tests) - Hanna Instruments

    Brand New · Hanna
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    $4.99 shipping
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    Frank's Tanks F-Aiptasia

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    $13.99 to $24.99
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    Hanna Instruments Marine Magnesium Checker® HC HI783 – Saltwater Aquariums

    Brand New · Hanna
    (1)
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    S⁣p⁣H⁣о⁣U⁣n⁣s⁣o⁣r⁣e⁣d⁣⁣⁣⁣⁣ ⁣0⁣T⁣⁣⁣ ⁣⁣A⁣G⁣⁣⁣⁣⁣
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    Catappa Almond and Banana Leaf Extract Concentrated Tannin Black Water

    Brand New
    $5.00 to $18.00
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