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#5
03-08-2014, 01:28 PM
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You are concerned with the tds coming out of the ro unit.
I stole this from as desert rat on nano reef. TDS does not necessarily mean 0 phosphates. Phosphates like silicates and forms of ammonia are weakly ionized and may not register on a hobbyist grade TDS meter, it would require a conductivity or resistivity meter to get to that level for sure. That being said, if you are getting a reading of 0 TDS I would say its safe to assume the phosphate levels are low enough to not be a concern in the RO/DI water
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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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