Hi i want to start a reef tank, coming from freshwater i always just used tapwater with no chlorine in it. My water has a tds of roughly 400 tds. Would a 4 stage rodi system be enough to get my water safe enough to use for a reef aquarium?
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I ran a 4 stage for many years and my city water is about 340 ppm. Only recently did I actually test the TDS and find out I was getting about 15 ppm residual TDS coming out. Added a separate 5th stage of DI resin to bring it the rest of the way down, but I suspect this would still be needed even with a 5 stage system since it is likely pulling out nitrates and phosphates that wouldn’t be helped by the additional pre-filter in a 5 stage RO system anyways.Hi i want to start a reef tank, coming from freshwater i always just used tapwater with no chlorine in it. My water has a tds of roughly 400 tds. Would a 4 stage rodi system be enough to get my water safe enough to use for a reef aquarium?
Its mostly composed of minerals like calcium and magnesium i have really hard waterI ran a 4 stage for many years and my city water is about 340 ppm. Only recently did I actually test the TDS and find out I was getting about 15 ppm residual TDS coming out. Added a separate 5th stage of DI resin to bring it the rest of the way down, but I suspect this would still be needed even with a 5 stage system since it is likely pulling out nitrates and phosphates that wouldn’t be helped by the additional pre-filter in a 5 stage RO system anyways.
So, the short answer is yes, 4 stage is probably fine, but depending on the specific contents of your water, you may need an additional DI filter.
Me too (good ol’ Missouri limestone), but the nitrates and phosphates are what I assume made it through because my Ca and Mg were never a problem over the 6 or so years I ran a 4 stage system with apparently 15 ppm getting through.Its mostly composed of minerals like calcium and magnesium i have really hard water