Hey,

I'm new to discus but not new to cichlids. I have 9 discus ranging from 12cm up to adult's ,3 rainbows ,around 50 x guppies and a few B/nose in a 2000ltr planted system consisting off a 8x3x3 and a 4x2x2 sump. I have read that water changes are a must for keeping these fish happy. I change approx 1000 ltrs per week and I'm starting to think that's to much. 2 discus see to like the changes but the rest seem to take a couple days to feel at home. I was thinking off dropping the changes to 200 ltrs per week,what do you guys/gals think?

Cheers Sean