Posted 1 Year, 5 Months ago cinder Expert Boarder Posts: 112   Any comments on this for a 35 gal tank? Thank you The administrator has disabled public write access. Posted 1 Year, 5 Months ago quasidog Expert Boarder Posts: 100   These are not for reefs. The administrator has disabled public write access. Posted 1 Year, 5 Months ago arksdad Expert Boarder Posts: 127   If you mean a reef tank, then its great for quick clean-ups, or for use as a 'valonia vac' but don't expect it to provide adequate or effective filtration. The administrator has disabled public write access.