API Freshwater Master Test Kit, Aquarium Water 850 Test Kit

API Freshwater Master Test Kit, Aquarium Water 850 Test Kit

4.8 stars out of 92 reviews
(4.8)|
92 ratings

Key item features

  • Contains one (1) API FRESHWATER MASTER TEST KIT 800-Test Freshwater Aquarium Water Master Test Kit, including 7 bottles of testing solutions, 1 color card and 4 plastic tubes with cap
  • Helps monitor water quality and prevent invisible water problems that can be harmful to fish and cause fish loss
  • Accurately monitors 5 most vital water parameters levels in freshwater aquariums: pH, high range pH, ammonia, nitrite, nitrate
  • Designed for use in freshwater aquariums only
  • Use for weekly monitoring and when water or fish problems appear
Current price is $38.64
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4.8 out of 5 stars
stars92 ratings32 reviews
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Pros
  • : Offers affordable water testing options.
  • : Simple operation with minimal guidance required.
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Showing 1-3 of 32 reviews

Jan 17, 2026
juliann
Item details
Size: 9.13 x 3.5 x 4.63
Sold and shipped byPet Paradise, Inc
5 out of 5 stars review

Verified Purchase

API Testing is a great kit.

I was using another brand dry strips (not impressed) %26 read to try API Master Kit. A big difference. Company does great job explaining why you do the specific tests %26 how to do each test. I very much like on each solution it again lists how many drops you need. Very nice case for test bottles %26 drops. Will buy again.

Helpful?3IRG6QUXI6W024871748
Nov 11, 2025
Ali
Item details
Size: 9.13 x 3.5 x 4.63
Sold byAbit ProductsDelivered byWalmart
5 out of 5 stars review

Verified Purchase

The only accurate test kit for freshwater aquariums, it really helped me see the problems with my water quality that strips tests missed.

Helpful?3IRG6QUXI6W024871748
Sep 17, 2024
Claire
Item details
Size: 9.13 x 3.5 x 4.63
Sold byNature's HealthDelivered byWalmart
5 out of 5 stars review

Verified Purchase

Excellent test kit

This is a great test kit. I tested my tap water, my distilled water and the water in my turtle tank for 2 weeks. As you can see only the distilled passed the PH test. The tap and turtle tank water did not. Upon researching why this could be, it seems to be due to the water treatment. I have a nice one gallon counter distiller for my drinking water, tea, coffee, cereal. It would be impossible to distill 75 gallons from that for the turtle tank so I will be looking for other methods. The ammonia is kept down in the tank by activated carbon pellets (first test photo) but dissipates naturally in the storage bottles used for the feeding container and replacing the evaporated from tank daily.

Helpful?3IRG6QUXI6W024871748

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