9415, is there a best depth?

[jim.l]

As in title, is there a best depth for this skimmer or does anything in the listed range (3.9 = 7.9 in) work equally as well? Most skimmers have an optimim depth to perform best.
Thanks, Jim

 

[rvitko]

For practical purposes the range of 5-7" is the best, mainly a little extra water gives a buffer against the pump running dry which will ruin it in short order and running the water a bit lower than maximum allows you to run more air, the pump takes in more air when it has less water pressure on it and the skimmer will have a lower standing water level and can handle more air.