Phresh filters are world renowned as some of the very best carbon filters available. These filters will go well with most fans connecting either direct to the fan or via a small piece of ducting and using clamps to tie them on either side.
Remove any odor from the air using a quality filter and keep your grow happy with fresh air.
These are ideal for indoor Hydroponic systems where humidity and fresh air will be essential.
Be sure to pick the size that fits your fan
4 inches matches 100 mm
6 inches matches 150 mm
8 inches matches 200 mm
10 inches matches 250 mm
12 inches matches 300 mm
Other sizes available upon request (email firstname.lastname@example.org)