I did a water change on Tuesday, added a pleco to the tank on Wednesday, and woke up on Saturday to both my goldfish and my pleco covered in white spots. Went to the store I got the pleco at, they sold me ich treatment. Today I noticed the red spots on the goldfish, and this evening (Sunday), I saw the goldfish’s tail looked shredded.
I’ve never had any issues in my tank like this before!! I have no idea what to do and I’m not fully confident I even know what’s happening. The pleco seems fine and to be responding to the ich treatment, the goldfish seems worse! They haven’t interacted much from what I’ve seen, so I don’t think the pleco is bothering him at all.
pH is around 7, ammonia, nitrate, and nitrite are all at 0 ppm per my water testing kit. Tank is around 76 degrees.
I did a water change again last night, parameters are the same as listed above, and I added aquarium salt this evening.
What else can I do for my goldfish? He comes out to eat but then goes back into a little cave I have in there and rests at the bottom.