Bio Balls!

[Whatigot]

Originally Posted by justinl

i dunno... clean them too often, and I can see you limiting the bacterial growth.. which would defeat the purpose of the things in the first place. There's a fine line.

This is assuming that the only thing you have for dentrification is bioballs, I.E, if you had LR in your tank, the loss of bacteria would be negligible.
Noone says you have to clean them all at once either.
The line is only as fine as you make it.