so, i noticed a couple aiptasia on the "drain side" of my sump 2 weeks ago. Got an aip-eating filefish. checks on it yesterday... i had 20-30 mini ones! the pump/return side still had noting thankfully.
So about every 2 years, i seem to drain/disconnect my sump and clean it out. this time around i drained/disconnected it... put it on a couple furniture dollies and hosed it off. then i scraped every surface.. rinse, then i powdered every surface w/ kalk. about 10 mins later, filled it up w/ water again, let it sit. ask i manually cleaned everything that belonged it the sump, they went into this super-kalk tank to soak. all the heaters that had those rubber ends on them.. removed. Limiting surface area for things!
then rinse twice, finale fill/rinse w/ prime. everything back in.
its crazy how clean a clean sump looks. Now i need something to hold a filter tray above a filter sock. I'm abandoning the bioballs finally.