filtration

I Red Sea Max 250 that has been running for about 5 years now and I have always had some issues with algae/ high nitrates/ high phosphates. I do regular water changes but my corals have never seemed to really do that great. Most live but never have great color. I have been following some forums...

So the guy at my lfs said to not use filtration while using chemiclean for 2 days (when chemiclean is done working.) So i was turning off my filter on my biocube 29 when i realized that the filter and air pumps are connected! So then i asked myself about if my fish will die without flow (I also...