[chuckeff]

I have always heard that lower water flow rates were used in planted aquarium, but I do not know of any certain amount. For example, my heavily planted 55 gal tank is powered by a powerhead that circulates 800 gallons an hour. That seems high to me and was wondering what a more correct flow amount is since I need to get a new powerhead anyways. Thanks in advance.

 

[Rex Grigg]

Actually you will find that a planted tank needs a lot of water circulation due to the plant load. Even though it doesn't seem like it the plants offer a lot of resistance to water movement. On my 55 gallon tank I have a Rena XP-3 and two powerhead to eliminate dead spots.

 

[Sir_BlackhOle]

I think what you may be referring to is surface agitation. when using co2 you want minimal surface agitation to prevent loss of co2.