How many power heads?
I need to get some more flow in my tank, and need to get some more power heads. Any suggestions?
I am thinking 2 on each side, 1 low and 1 high.
Right now I have 2 Hydor Koralia Nano 425, and those are not enough. Do you think I should get 2 more of those for the bottom, or do I need to get 4 new ones with higher flow? I don't mind spending the money so let me know, also not stuck on the Hydor brand.