3 Pack - 4 Stage RO/DI Value Replacement Filter Kit reefing This product is great for

This product is great for filling DI

Essentially the DI is simply polishing off the remaining TDS of the membrane and therefore fewer TDS out of the membrane make the DI last a longer

100% Melt Blown Poly-Polypropylene Filter

different customers like to place it on different ares of the system

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3 Pack - 4 Stage RO/DI Value Replacement Filter Kit reefing This product is great forThis is an excellent replacement set for the 3 & 4 Stage Aquarium Reef Reverse Osmosis Water Filter System. The replacement set includes: 1) One 5 Micron Sediment Filter. 2) One 5 Micron Carbon Filter 3) One Supreme Quality RO DI Color Changing Resin Deionization Filter.