Water Parameters:
pH - 8.0
Nitrates - 10/20 ppm
Hardness - we have hard water with a water softener on a well. The test strip is hard to read possibly 25 ppm?
Nitrite - 0
Ammonia - 0
KH/Buffer - 180 ppm
Water Temperature - 72F
Hello everyone. I’m hoping someone can help me out. I’ll try to keep it short but give as much info as possible. 75 gallon cycled tank, 1 goldfish (this is the fish in question), 1 bristle nose pleco, 11 zebra danios. The goldfish has red spots that appear and disappear all the time. The pleco does attack the goldfish on occasion but even when we removed the pleco for a period of time the red spot still showed up. Pictures attached of the spots. Also, none of the other fish have signs or symptoms of anything being wrong with them. Any ideas?