What are peoples thoughts on thses internal filters ? i have never used one befor and thought it would be best to get a little heads up from people who know and use them ? i'm considering getting one for my 30gal
I've always used Eheim models and never had any problem with them.
It's a eheim aquaball filter !

I've always used Eheim models and never had any problem with them.
It's a eheim aquaball filter !
