You haven't changed your RO/DI filter cartridges in a while.
No, we're not telepaths.
We just know you wouldn't be reading this right now if you weren't interested in scoring some FREE replacement filters for your reverse osmosis/deionizing system.
Produce 0 TDS for mixing saltwater and topping off your tank with Captive Purity's excellent RO/DI replacement filter kit.
Want the highest quality water in your aquarium? ENTER NOW.
Registration ENDS at 11:59 PM PST on 3/7/14.
Details: Open to U.S. residents 18 years or older. Void where prohibited or restricted by law. Winner will be contacted via email.