I posted a thread earlier about my cyano problem. It has gotten better, but it seems "low flow" is supposed to be one of the problems that causes this. I now have an Octopus 1500 GPH on one side of my tank and a Koralia 3 and a 250GPH on the other side of the tank. So I have 2600GPH of flow in a 55. The problem is no matter how I point the powerheads, my xenia are bowed over as if in a hurricane. So I'm thinking the Octopus was a little bit of overkill. Any suggestions? Should I downgrade from the 1500?