18x18x1 Pleated MERV 7 Air Filters 12 Pack spl_dlw These blocks have an excellent

These blocks have an excellent water absorption and (re)saturation rate and feature the exclusive Plant Comfort fibre structure which has a lower density of resistance during rooting with no loss of firmness

Sachets are sold in boxes of 25 pieces

Collapses flat for storage in the handy zippered case

so you can apply nutrients and supplements the same day you plant

The Master A&B series stands apart from your standard base nutrient line by making macro and micro nutrients more available to your plant

18x18x1 Pleated MERV 7 Air Filters 12 Pack spl_dlw These blocks have an excellentNordic Pure MERV 7 Pleated AC Furnace Air Filters provide exceptional filtration for both home and commercial environments. Each time air passes through a Nordic Pure pleated furnace air filter, lint, dust, pollen, bacteria, pet dander, dust mites, mold spores and other contaminants are removed. MERV 7 furnace filters are comparable to HVAC filters with the rating of MPR 600. While different companies use different scales to measure the air filters