GrowMax Water Replacement Filter Pack For Eco Grow 240, Power Grow 500, & EC Eliminator Rockwool Slabs The substrates used in run-to-waste

The substrates used in run-to-waste are mostly inert (which means they don't add or take nutrient elements from the nutrient solution)

A Single-pole thermostat operates off one circuit

ALSO CONTAINS NONPLANT FOOD INGREDIENT(S):

Mixing nutrients for different stages of growth is not only incredibly time-consuming

GrowMax Water Replacement Filter Pack For Eco Grow 240, Power Grow 500, & EC Eliminator Rockwool Slabs The substrates used in run-to-wasteGrowMax Water 10" FILTER REPLACEMENT PACK For use with GrowMax ECO GROW, POWER GROW, and EC ELIMINATOR Reverse Osmosis Replacement filter pack for gardening and hydroponics. Contains 1 Green carbon Block Filter and 1 Sediment Pre Filter.