I used One HOB
filter (appropriate for size of tank) and one Skilter filter (once again for appropriate size tank) The skilter skims AND filters like a regular HOB
. Then a bought a HOB
skimmer sperately. Was very inexpensive and worked like a charm. Oh, and I also had two powerheads which were nice for placing IN the tank that would move sediment and water very nicely. Also they could be moved at anytime to change water flow if you were to have any algae outbreaks. I was breading Xenia, mushrooms, polyps, and bubble anemonies like no body's business in that tank. BTW - my tank was a 55g. Good Luck my friend and Have fun with it!!!