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#5
02-04-2010, 12:20 AM
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I have a inline TDS meter that measure water in and out. I don't use DI, so I get TDS of 1 after filtering. Once this starts to increase I usually do a backflush to return it back to 1. Once backflushing doesn't work, then it is time to replace. Usually this is 1-1.5 years.
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 Setup: 180G DT, 105G Refuge (approx. 300lbs LR, 150lbs Aragonite) Hardware: Super Reef Octopus SSS-3000, Tunze ATO, Mag 18 return, 2x MP40W, 2X Koralia 4's Wavemaker Lighting: 5ft Hamilton Belize Sun (2x250W MH, 2X80W T5HO) Type of Aquarium: mixed reef (SPS & LPS) with fish Dosing: Mg, Ca, Alk 
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