GrowoniX Deionization Filter Replacement Cartridge Filter Size:(GROWONIX) 4.5" x 10" They will dissolve in water

They will dissolve in water and become a solution

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Introducing: pH Perfect Sensi Coco Grow Part B

polycarbonate

GrowoniX Deionization Filter Replacement Cartridge Filter Size:(GROWONIX) 4.5" x 10" They will dissolve in waterMixed bed deionization resin for polishing the final bits of TDS from RO water. For those who need absolutely pure water. Great for aquarium systems, or those with certain well water issues. Mixed bed deionization resin to eliminate the final bits of TDS PPM in RO water. For those who need absolutely pure water. Great for aquarium systems, laboratory use, or those with certain well water issues. Available in 2510, 2520, 4510, and 4520 size cartridges.