So I haven't added any new fish to my tank for roughly a year, and I am seeing what looks like ich on 2 of my cardinal tetras. I am at a total loss. Is this even possible?
Tanks parameters are:
20ppm nitrate (I am lucky to get it down that far even heavily planted)
Temp is 75F
I do 50% weekly to bi-weekly water changes
I use prime water conditioner, it's a 55g with a marineland 360 and a Aqueon HOB
rated to 40 I can't remember it's been to long. Dirted with a black blasting sand cap, heavily planted with a 5 white skirt glofish. 6 Cardinal tetras and a goldfish (Yes I know Bubbles shouldn't be in there) My daughter brought it home from the fair last year. The Cardinals are getting old and are all over 2 years same as the glofish which are 2-6 years old. I lost my 5 year old bristlenose pleco about a month ago. This tank has been running for the last 5 years. The goldfish was the last addition and that was over a year ago. So I am at a loss as to what is going on with the cardinals. Their fins are also looking pretty rough.
Any ideas would be greatly appreciated.