Blue sponges

[YumSaltWater]

Ok so i ditched the bio balls/ceramic rings in the back of my tank and replaced them with live rubble. I still have those blue sponges though, is it ok to just get rid of them? Or do they serve some purpose. I know they can build up gunk if they are not cleaned but do i need them to catch the gunk in the first place?
help me out please!

 

[DaBird]

I would take them out over a period of about two weeks, gives the tank time to adjust to the new conditions...

 

[lcstorc]

I keep one in the back of my Aquapod to catch debris from the overflow. I clean it very frequently at least twice a week. Mine does get dirty more quickly though since it is in my overfed pony tank.

 

[justsunnie]

I keep one in the back of my Aquapod to catch debris from the overflow. I clean it very frequently at least twice a week. Mine does get dirty more quickly though since it is in my overfed pony tank.

ditto, except for the pony tank part.

 

[johnbljr]

ditch it...use filter floss for catching the debris.