Hydro-Logic Green Coconut Carbon Filters roi-e420 which has been used by

which has been used by professional growers and nurserymen since 1945

Another powerful feature of the Hydro-X Pro is the built-in calendar and calendar presets that allows the user to schedule an entire crop’s “recipe” within the Hydro-X Pro

Cal-Mag products

Easy to setup and operate

and chemical odors

Hydro-Logic Green Coconut Carbon Filters roi-e420 which has been used byGreen Coconut Carbon Filters are the carbon block pre filter that will reduce chlorine, organic chemicals, VOCs, mercury, lead, PBCs, sulfur and heavy metals. #741604 is 20 in x 4. 5 in. #728845 is 20 in x 2. 5 in. #741646 is 10 in x 2. 5 in. #741656 is 20 in x 2. 75 in.