Biggest thing for red tails, WATER CONDITIONS. I use mine to guage my water conditions. If I see the slightest change, then I automatically do a PWC
. But since I do 50% weekly now, my red tail is a beautiful black, with a very bright red tail. So my thoughts, not enough PWC
's. If you do a 30% weekly, you should have no problems at all with him getting grey.
Here's my parameters to compare to yours:
ph driven down to 6.4 via CO2
injection, normally 7.2.
No gravel vacs, heavily planted tank. Just light cleanup up front and pruning on occasion.
50% weekly PWC
May also be caused by stress of other inhabitants, as stated in another post. But I've never seen this myself. I've had mine 3 months now, and had one for 2 1/2 years when I was in college, and never seen one turn almost white. Just slightly greyish, which a PWC
corrected the problem. I sold that guy at 6 inches when I quit college and went into the Navy. My guy now is just under 3 inches, and very beautiful.