FAQ #47: Why can't I get 99% rejection on my RO membrane?

April 11th, 2017
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Today on BRStv, we have another episode of BRS 52 FAQ where we answer all of your frequently asked reefing questions from our popular 52 Weeks of Reefing series.

This week we are answering Kenneth C’s question, "Why doesn’t my 99% rejection RO/DI membrane achieve the listed 99% rejection??"

Not all membranes are created equally, and recently DOW has introduced a 99% rejection membrane making it one of the best membranes for residential reverse osmosis water filtration. Just like membranes, not all water is created equally too. Depending on how you obtain your water, if it's through a city source or a well, the minerals and other possible contaminants can change how your membrane performs. Other variables like water pressure and temperature will directly affect the rejection rate of your membrane too.

So follow along as we answer today's question, provide some helpful insight, and help make reefing just bit more fun and easy for you and your tank.

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