I believe either is good the only difference I know is that the GPD output seems to be less at most water purification stores. Most I have seen are 25-50 GPD and most reefers like 50+ GPD. Just my .02
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Nuvo 30, 165W dimmable LED pendant, Hydor Slim Skim Nano, Vortech MP 10w ES
Current Tank Info: 30 GAL Reef
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