there is a longer post on this but I am hoping for a quick answer I lost allot of my fish I saved the last two by adding a air pump the tank was doing fine I added a second filtration system and everything went bad in the tank coincidence? I have a fluval 304 on my 65 gallon tank I had a powerhead on it before the store recomded I go to the fluval but never said I should add a air pump I don't even know at this point if it should have had one. so yes or no and would it be worth it for me to go from the fluval to the enhiem 2026 I have read some reviews saying it's allot better but is that hype. don't worry not going to add any more fish for a while till I learn more