K knuckle Feeder Fish MFK Member May 7, 2012 10 0 0 wisconsin May 7, 2012 #1 Hello, I have a 160 gallon tank with 12 Discus. One Discus has turned black and MEAN. He is 4 years old and was normal up until 4 weeks ago. ph is 7 temp 86 sand bottom. Thank You for reading any thoughts?
Hello, I have a 160 gallon tank with 12 Discus. One Discus has turned black and MEAN. He is 4 years old and was normal up until 4 weeks ago. ph is 7 temp 86 sand bottom. Thank You for reading any thoughts?
