thanks pal.
Thanks. The discus were actually in this tank at one point. I moved them for 2 reasons. There are 2 pairs in my group. Moving them to the new tank broke the pairs up and all breeding stopped.(Obviously a move would, but the tank was too stressful for them in the long run)
The second reason is, i built a 310 gallon breeding rack for the 2 pair. So i moved them back to their 150gal while i awaiting the pairing up/egg laying to start again. I'll then move the pairs to the breeding rack, and the rest can go back into the 540gal.