Thread: PH and hardness
12-24-2006, 01:45 AM #11
RO is reverse osmosis, basically very fine mechanical filtration that actually takes out things like calcium and magnesium, as well as many other things depending on the cartridges used. You hook it up to your source water and it collects in a collection tub. It is one of the purest forms of water available.Owner: Aquarium Maintenance and Pet Care Company
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