Quote:
Originally Posted by no_sushi_for_you
Fyr - I am curious to why you have your powerheads on a 20 hour on, 4 hour off cycle?
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Well, here's how it came about... Flow in my tank includes my Velocity T3 return split into two, two MJ 1200's, and two Koralia 4's. I run them all on an AquaController Junior. The return is on all the time (except during feeding, the MJ's are on a program to randomly cycle on and off sometime between 1-5 minutes to create random flow, and my intent with the K4's was to use them to create somewhat of a "tidal" flow. They are on either side of the tank facing toward the front center.
I started out with them on alternate cycles of 8 hours on and 4 hours off to alternate the direction of the flow in the tank (4 hours L->R, 4 hours both, 4 hours R->L, 4 hours both, repeat) but I got tired of hearing the clacking when they started up. I then tried 16 hours on and 8 hours off on alternating cycles but decided that I didn't like having a K4 off for 8 hours at a time as they provide a substantial portion of my in-tank flow. So now it's at 20 hours on and 4 hours off on alternating cycles. This still gives me some periods of alternating current but doesn't reduce the in-flow tank for too much of the day. (The twice a day clacking still lets me know when it is 2am or 2pm though

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