Phresh Filters and Phresh Pre Filters just added to Hydroponics Unlimited.  All sizes, and as always discounted from the msrp price.  Presh Filters are the best around and there are sizes to fit all needs and keep you growing:

1) Aluminum tops and bases for reduced weight. Half the weight of competitive filters.
2) 6mm (1.8″) RC-48 activated, certified virgin carbon bed.
3) Machine packed carbon means more carbon and less movement.
4) Cone shaped internal base for optimum air flow.
5) Sealed, bagged, boxed and labeled directly after being manufactured for optimum life span, handling and presentation.
6) 51% open air custom mesh.
7) Unique Anti Air Bypass System.
8) Large selection of sizes available to fit any application.
9) Flange & prefilter included.
Get ’em now at hydroponicsunlimited.com