10x18x1 Exact MERV 7 AC Furnace Filters 6 Pack Tents / Indoor Greenhouses Primo TDS uses a single

Primo TDS uses a single button at the top of the meter

2 cfm vacuum pump

4 RAW Phosphorus - 2 oz

It stimulates explosive growth and heavier blooms

(3) 6' Soil Probes

10x18x1 Exact MERV 7 AC Furnace Filters 6 Pack Tents / Indoor Greenhouses Primo TDS uses a singleNordic 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