low ph

Hi everyone. This fish is in a communitarian thank with some American cichlids. First I would like to know if this is an Mbuna, and second, those brown marks in all his body wasn't there according to my colleges. It is a disease or it is normal on them? i assume due to the setup of the aquarium...

So I am currently doing some research on discus. While watching many videos, talking to discus keepers, and searching the web, I have noticed the same thing being repeated... “low ph” “must keep ph low” “ph between 6 and 7”. I also read that you can keep discus in a tank with a ph around 8, but...

new flowerhorn for a little over a week. LFS ph is near 8 I believe, and mine is 6. Big difference. Accolomated the fish in a few hours with drip and it seemed fine when I finally put it in. I noticed later that day it got stress bars and I assumed the ph was still to low and would need way more...