If you mean nitrate filters:
I tried the Aquamedic 1000. It worked but couldn't handle my tank.
I'm currently cycling my Natureef CDECX-2 nitrate filter (with phosphate option). It's coming along nicely.
Originally posted by TheReefManiac
Has anybody had any experiance with Denitrifiers. Good or Bad?
No experience and don't care. plant life is all the denitrifer I need or want. Besides it does so much more than remove nitrates.