The Why Oh Why...38 stairs, 290 Tank Build

[reefwithareefer]

Originally Posted by reeferfulton

if you run 2 different return pumps for various times of day then..

You wound run into problems with your drain system depending on how its designed.

for example if you have a herbie design and its set perfectly for the pan250. when you switch to the smaller pump at night your drain will lose full siphon and your sump level will raise.

Usually herbie or doso drain designs are matched to 1 return pump by setting the gate valve on the main drain. So with this idea i think you may have issues , thats unless i am missing something ?

I never thought about the Herbie....I was thinking sump level might change and cause issues with the skimmer ..

I have not used the Herbie, but plan on it for this tank build.