i have had power heads in the past and i really like them. i planed to get 2 for my conversion. im converting a boring 46 gal with lots of large convicts to a plant filled tank with a few med to large fish. i am doing alot of reading about plants and i read 2 different articals that just slightly touched on power heads. 1 said they wouldn't use them because too much circluation is not good for the plants. he was real brief on the reason. the other actully sugested useing the power head to get co2 in the water. i believe he was refering to a diy set up. anyone have powerheads?