SuperColey1
Planted Section
So, what if you're not using CO2? Do the pH and KH go hand in hand in the same way?
In most cases the Ph and KH go hand in hand. they are however independent of each other. influenced by if you like.
You can see this simply by finding someone else in the country who has the same Ph as you. They may have very different KH.
So you see a KH of X does not mean a Ph of X. however in most cases the KH drops and the Ph will drop.
If Ph mattered so much then we would be trying to get water really acidic (<4) for some amazon species. But we don't we don't need to stick rigidly to those guides we are told at all. In fact many of those guides that give you a very narrow corridor (i.e. between 6 and 7) are miles away from the fish's actual natural ph. We can keep Neons for example in Ph from 3 right up to 9. Many people can show this. KH in there can also be irrelevant.
More important is water quality and stability.
Andy