It depends upon the fish. Some fish are designed for harder water (with a correspondingly higher pH though this is not always a given) and some fish are definitely in need of soft water with a lower (usually slightly acidic) pH. But there is a lot of variable in this.Hello All
Can someone tell the affects of a high ph on fish of 8.2 using a kit everything else is in the normal range some say don't mess with it just keep it the same no high/low up and down. I do 25% water changes weekly.
Thanks for any help
What fish species do you have, or are you wanting to get?
Also, what is the GH and KH (Alkalinity) of your tap water? The GH is actually of more importance to fish, as we (in the hobby) are now learning. You don't need to get a test for GH and KH, just check with your municipal water board who likely have a website. GH is general hardness, and KH is carbonate hardness often called Alkalinity. If you find data online and can't decipher it, post the link and I or someone can take a look.
You might also gain some background info from my brief article on hardness and pH, here: