I have 6 discus all eat like pigs doing great raised and grown out in a bare tank with every other day 50% wc..........I put them in my planted 150 and they darkened up dramtically, so i figured it was the co2......I cut the co2 completely waited a few days still nothing......they were eating the entire time in the tank tho it was just a darkening issue..... Its about 3wpg on the tank can it be a light issue? maybe they just are used to a bare tank and 2 weeks wasnt enough to adjust? ......... they are back in their bare grow out and im wondering what to do so i can get them in the planted 150 and get 6 more quarter size discus to grow out in my bare tank.......any suggestions? btw my water perams are perfect and was doing every other day WC in the planted also while they were in there :help: