cloudy eyes

So I have a pacu in a 125 with a red tail and 2 channel cats. One of my canister filters began cycling much weaker for some reason and now the water has a brownish tint.I didn’t notice it because that tank has a blue light so I could not tell the water was fouling. I had a red devil and some red...

So I just bought a used fish tank from a friend and the fish tank was completely gross, I’d say hadn’t been cleaned in a year or more, the back wall was solid algae. So anyway the tank came with a 8 inch goldfish in it, and anyway the goldfish has many problems now that it’s a new tank. I have...

One of my 3 datnoids in a specific tank has developed a cloudy eye, only on one side, I haven't treated yet due to it being just the one & I don't know whats caused it. I have the tank stocked with silver aro, African aro, stingray, 3 dats and 5 bichir. I've read it can be water parameters, but...

Currently Both eyes look like there’s an X threw the iris. Most of my group has this. Usually their eyes are crisp and dark. Never seen it before this week. What is this? Veins? Cloudy eyes? Eye structure? Light too bright? Something else? You’ll have to zoom in to see the one on the...

Good afternoon everyone, TLDR; Woke up after moving my arowana to find two of them had cloudy eye that I can't seem to beat. I've tried nearly all the remedies I can think of and looking for more suggestions. Long time lurker, first time poster. I recently got back into Arow's after about a 5...