28x36x1 MERV 13 AC Furnace Filters 6 Pack Emitters try using an old cereal

try using an old cereal box with both ends opened

Cover with opaque plastic or foil

depending on the strength of nutrient mixture and purity of the water source used

Sluggo works just as well and I don't have to worry about him getting into the granules

Regular Feeding: Mix ¼ – ½ tsp per gallon of water

28x36x1 MERV 13 AC Furnace Filters 6 Pack Emitters try using an old cerealNordic Pure MERV 13 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, smoke particles, virus carriers, coughs and sneezes, smog, allergens and other contaminants are removed. MERV 13 furnace filters are comparable to HVAC filters with the rating of MPR 2200