I have an Emerald 34 sump with the strange oval shaped filter sock holders. I want to get filter cups for it instead, but the opening above from the top of the sump narrow, so a Red Sea cup doesn’t fit.
Might bust out the Dremel on the sump, but I’d rather avoid making any permanent modifications to it. I was hoping someone might be able to point me to a manufacturer they’ve used that works for it. Thanks!
Might bust out the Dremel on the sump, but I’d rather avoid making any permanent modifications to it. I was hoping someone might be able to point me to a manufacturer they’ve used that works for it. Thanks!

