What is the reason for running unskimmed H2O Through the sump? Is it just to get it established? Once the dsb is aged and cycled, is it ok to run skimmed H2O through there? Still learning about this stuff... My dsb fuge has been running unskimmed for about 5 months and I have asked for a killer skimmer for Christmas. My phosphate prob is gone as is the ph & alk swing prob.

The sump is designed such that the tank overflow will feed the new skimmer that will empty to the fuge... Is this design ok?