Actually since the rena stars are black and float, all of them are floating on the surface getting sprayed by clean water from the spray bars. they are moving under water than ontop getting bounced around by the current inside the net! To me it seems like a really good idea. On my other tanks i have ac500s with flaoting rena stars, this huge tank i have though with my little wetdry invention is flushed against the wall limiting my options for more filters other than lots of canisters. Any help on the scientific outlook on this whole thing will it work.