help #acan

Help I don’t know how to get my phos down I do weekly water changes in my (Max Nano) 6gals at a time. Everything is happy except my acantho this dude was happy for like 3 weeks after I got him but now is throwing a fit with a gaping mouth and won’t eat I’ve posted my parameters and I dose all...

I did a water change on monday and I used water I mixed from a few weeks ago and it turned out that it had a very low kh. I immediatly noticed and ive been doing 10% water changes to boost it daily since then and most things have gone back to normal and have been looking good other than the acan...