To clean my overflows or not

[cwatkins]

Originally Posted by sully08

I have 2 internal overflows in my 220g. They are starting to fill up with hair algea and other types of algea. Should I clean them out or let them be. Would they act like a refugium and remove some access nitrates and would they house some benifitial critters

Mine only has sponges growing in it. I would get rid of the hair algae.