Planted Tank Guru
Join Date: May 2011
Location: Chattanooga, TN
Well it sounds like ur sump a. Does not have enough mechanical filtation and b. Definitely does not have enoug flow.
My 75 gallon has about 680-700 gph through it and the sump. I have no blown plants or fish unless they stray in front of the outflow. And i have clear water.
I only have. 1 mechanical pad, the rest is bio. I think ur issue is flow rated.