If the valve sump is not needed and you don’t wish for it to accumulate water and algae a Sump Cover is available, which can be glued over the sump using the special Ebb and Flow glue.
If the valve sump is not needed and you don’t wish for it to accumulate water and algae a Sump Cover is available, which can be glued over the sump using the special Ebb and Flow glue.