overflow sponge?

[corbett_n]

should I keep the sponge that covers up my drain tube on my overflow?

[FlyinggFish]

Can't hurt as long as water is coming out of the pipe effeciently

[FlyinggFish]

Can't hurt as long as water is coming out of the pipe effeciently

[corbett_n]

I just didn't know if the sponge ends up turning into a nitrate factory

[kware]

I use them I just rinse them out in the sink every 2 or 3 days.

[kware]

I use the sponges instead of a filter sock.