RF Filter Set nutrients and supplements Grodan A-OK plugs are designed

Grodan A-OK plugs are designed for seed and cutting propagation prior to "blocking on" into larger growing blocks

so the plant can recover from the treatment

Available in 3 ft intervals to support CMH lighting footprints

This replacement filter is easy to install

higher intensity in a Mars Hydro grow tent

RF Filter Set nutrients and supplements Grodan A-OK plugs are designedThe RF Filter set is a product of necessity. Over the past year the FCC has come down hard on electronic ballast manufacturers. Until recently electronic ballasts received little attention. However, as more and more gardeners switch to electronic ballasts, the FCC has started to take notice when it comes to both emitted and conducted radio frequency interference aka RFI. The more electronic ballasts that are in operation the greater the disruption.