Oh those K2s are definitely getting swapped out. They are barely enough for my 90 gallon. I have a few SPS' :-) They will have to tough it out until I replace the K2s with at least one Vortech MP40. I thought about getting K4s but I know that I want the Vortechs eventually so I'm just going to save up and go straight to the Vortechs and try to live with the K2s until then. I might have to stick my hand in the tank and stir it vigorously every day for a bit..
