I've only every run a reactor and for me it's set and forget. I haven't tested anything in my tank in about half a year now and I run a full blown sps tank. I get good growth and I'm a relatively lazy reefer who doesn't do much for maintenance. I've never tried a doser so I can't compare. I just run the reactor with a steady stream coming out and control the ph within the reactor with my aquacontroller III. Hope this helps.
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