| I followed MCA's advice. I put both air pumps on a hand controlled remote. So, I can just shut them for viewing. Both of my air pumps are 110liters. I also have 3 waterfalls running off two pumps. One is 5,600gph, the other is 4200gph. All should be well with this set up. Last season, I had two air pumps half this size...and everything was fine. I will measure O2 levels anyway...just to be safe. Thanks again!! |