I'm looking for a pump suitable for a 30 gallon outside tube (barrel shaped) and a powerhead or pump suitable for a 20L. The 20L will be a riffle tank.
Please tell me how many GPH you are looking for in a pump. Saying you need a pump for a certain size tank does not help me much, since people have different preferences on what they like. I have two 400 GPH powerheads that are pending. I have a couple really small pumps left and one 500 GPH pump, however it is being sold with the 40 gallon setup it is on right now.