Water test (PH, KH, etc) on compressed CO2 planted aquarium
Hello guys and girls!
I would like to know from where in the planted tank I need to take the water sample to measure pH, kH and others. Time ago I read that it was supposed to be taken from bottom of the tank, away from the return. Every video I have seen, it shows the water being taken from the top or it doesn't say.
I know the the pH, kH and others changes around the aquarium, but I would like to know the best and accurate (?) place to do the test.
Thanks for your information
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