I am going to purchase some powerheads soon for my 47g column tank. I don't feel as though my tank has adequate flow the way it is now. I am thinking about getting 2 koralia powerheads that are around 350gph each(I think they were about $45). I currently have an odyssea 250gph.
I am wondering if this will be enough for pretty much any corals I may want, and if anyone has ideas related to placement due to the odd shape of the tank.
Also my canister filter puts out a good amount of flow itself (a Rena xp4) and the output can be setup as a powerhead or a spray bar. I have it set up as a spray bar now slightly under the water pointing at a 45 degree angle up to break up the waters surface. My thoughts on this was for better gas exchange due to my limited surface area.