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Originally Posted by kelben View Post
The pH can be based on other factors, namely, what is actually causing it to be high at 8.0, and while this is often the GH it is not here. There may be other substances in or added to the water to create a high pH.
The KH is high, at 180-240ppm, or between 10 and 13 dKH. This has no effect on fish whatever, but being bicarbonate hardness it does work to keep the pH stable. This means the p|H is very unlikely to lower much by natural means in the aquarium, unless the KH is "diluted" with pure water.
You can read how all this relates here:
So, back to the fish. As the gourami seems to have no trouble, the suggested corys shouldn't either. The GH is not high and that would affect them more. And I wouldn't rule out the Whiptail. The pH range in the profile has to have a limit but it is not cut in stone, and only because you have soft water I would suggest this species also is likely to be OK.
Last suggestion, as test strips can be inaccurate due to this or that, I would confirm the GH and KH with the water supply people, just to be sure.
Byron Hosking, BMus, MA
Vancouver, BC, Canada
The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian. [unknown source]
Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If youíre going to take it under your wing then youíre responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]