GrowMax 20" De-Ionization Filter
Removes 100% of salts from Reverse Osmosis water. The larger-capacity replacement filter for use in the 20" De-Ionization Filter Kit.
Change when necessary, or when checking your water's EC/TDS shows readings starting to rise above 0.
Which Size Do You Need?
This is the replacement filter for the 20" De-Ionization Filter Kit only. For the smaller kit, see the 10" De-Ionization Filter instead.
Launch DateSeptember 20, 2026
Days In Market28
VendorGROWMAX
Variants1