MoxieIV
Aquarium Advice Apprentice
Have a long established community tank that is in good shape as far as nitrates, Ph. I have a 55 gal. tank that is planted. Last week I added 6 young koi angels from a month long quarantine. That we're doing fine, eating well, etc. Last night I noticed one down on the bottom on its side. I supported it in the net,but it died overnight. Now the remaining fish are showing the only noticeable symptom, keeping their tail fins clamped closed. Only one of the five remaining isn't clamping its tail. All of them are still cruising around and eating. The others in the tank seem fine (list is on my profile). Water temp is 75* I'm planning on a partial water change tonight once I'm out of work. I'll try for 30%. Any advice is appreciated. I've had angels in the past without problem.