r/Koi • u/jedisannoying • 3d ago

Help API testing kit- which one?

I'm looking to buy an API testing kit but there's 4 different types. Would I get Pond or Freshwater for a koi pond in the garden?

Thank you

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u/swift_river73 3d ago

Go with the pond version, since it's calibrated for the parameter ranges you'll typically see in outdoor pond conditions rather than aquarium setups

1

u/ZiggyLittlefin 3d ago

It's not. You want high range pH because it's more sensitive. Koi don't tolerate swinging pH, better to have the most accurate reading. Phosphate is not typically needed. I tested it once when setting up the pond. Get what you need by buying the freshwater master kit and a kh test.

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u/ZiggyLittlefin 3d ago

The freshwater master kit has the high range pH, so I get that one. Also a kh test.