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#2
07-19-2011, 01:37 PM
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If it is starting to rise then the di resin is becoming exhausted. The ro membrane should be good for a few years. I like to use the colour changing di resin so i know when it goes from blue to brown it is starting to become exhausted.
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360 gallon sps reef, 180 gal sump, bubble king supermarine 300, 4xmp40Wes, 2 x 6215 tunze waveboxes, 4 ghl mitras 360 Reef Tank 
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