timed Powerheads?

[Aquaria]

Originally Posted by burgerchow

get 2 vortech mp40s and once you set the night mode, they automatically go down to 1/4 speed and come back on to full speed after 10 hrs. Just like Ronco Grill. Set it and forget it... best investment you can make for your tank.

so im guessing that lower flow at night is preferable and if thats the case ill keep doing what im doing since i cant really get much lower unless u can adjust the speed of the canister