Hi. I'm new here, but I registered because I need some help. I have a 55 gallon tank with 5 koi about 6" long and a bottom feeder a bit longer. I have I have a top fin hanging filter, keep the water at about 76 degrees, and have 2 bubble wands running in it. I have no idea as to the pH-I've never tested it because I've never had any problems except a few bouts of ick. The tank has been set up for 5 years.
Anyways, last night I noticed that my black and white koi had turned yellow-his whole head, and all the way around the edges of his body. This pretty much happened overnight. I keep a close eye on these guys. Then I noticed that another koi is starting to do the same thing. It's much paler on that one tho. The scales and texture look normal.
I've been looking on the net for answers, and I'm finding none. "Color changes are normal" doesn't work for me when the fish is 4 years old! Someone please help!!!
Anyways, last night I noticed that my black and white koi had turned yellow-his whole head, and all the way around the edges of his body. This pretty much happened overnight. I keep a close eye on these guys. Then I noticed that another koi is starting to do the same thing. It's much paler on that one tho. The scales and texture look normal.
I've been looking on the net for answers, and I'm finding none. "Color changes are normal" doesn't work for me when the fish is 4 years old! Someone please help!!!