Turning 6045 Off/On

[smithcreek]

I have a closed loop with about 20x's flow on my 92 gallon tank. I added 2 Tunze 6045s for extra flow. I know the 6045s can't be run on a controller, but is there a problem with turning one or both of them off each night?

 

[Herzberg]

no that is not a problem...