Sponge vs skimmer

[jjmcat]

I am currently keeping a rubble rock box in the dark end of my 4 ft long sump.I keep it dark so I can grow sponges for extra filtration.The problem I am having is I am needing more space to properly run my skimmer.Do the sponges really do that much in the filtration area?What would you all do?

[jjmcat]

BUMP

[edwing206]

Depends how many sponges you have. A small number won't even come close to replacing a skimmer.

[jjmcat]

Thats what I needed to know.The box is from an old oceanic sump and its full of sponges and ruble rock.Its 12 x6x6.