Piranhas Forum banner
1 - 1 of 1 Posts

·
Registered
Joined
·
209 Posts
They suck all the debris down into your gravel, and use the substrate for bio filtration. Down side is lots of crap wedged in your gravel for skyrocketing nitrate levels (unless you vac religiously) and a major pain if they get clogged/need maint.
 
1 - 1 of 1 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top