I had been getting just RO water from the store, which was obviously alot better than tap-water. I then purchased an RO/DI unit, which I find the water is fantastic to use as there seems to be alot less algae growth since I have started using it. I never checked up on all that stuff but everything I heard sounds to be the same as what matt said.
Chris
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No more tanks  - Laying off the ReefCrack for awhile!
Cheers,
Chris
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