#ed_op#DIV#ed_cl#30-40 times my 20 gallon tank. Wow. I was reading my pump box and it says the Rio 400 pumps out about 150 gal/hr so I am behind on that.This is really low to what you guys recommend. Should I leave the 400 and then get the 800 (200 gal/hr.) or do you guys have another powerhead that would work good in my 20 gallon tank along side the Rio 400. If you think I'm okay with just another 400 or 800 let me know, I don't mind having the same brand name for pumps.#ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl##ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl#Clement#ed_op#/DIV#ed_cl#