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Message: <blockquote data-quote="Lennon's Reef" data-source="post: 7406683" data-attributes="member: 147403">Thanks for your reply!I know the CaRx isn’t needed for my current demand, but I think it can be a good solution for a high-demand SPS aquarium (albeit only 11 gallons) which I hope my little tank will be some day. The calcium reactor was simply more appealing to me than going the dosing route.In order to give the reactor a test run (and also because I don’t have any two part solution) I decided to try to use it to raise my levels of calcium and alkalinity from 362 ppm and 5.5 dKH respectively to more reef-tank-appropriate levels. In doing so I discovered the limit of how much effluent I can push through the reactor without my solenoid going haywire. I was able to raise calcium from 362 ppm to 383 ppm and alkalinity from 5.5 dKH to 6.4 dKH with 48 hours of 1mL/min dripping while the reactor sat at a pH of 6.5. (Oh and I’m using Reborn media by the way).I feel like if it took two days to raise the levels by that small margin when I have almost no coral in the tank then the CaRx won’t be a viable option for a high-demand tank unless I can figure out a way to push more effluent/min out of it. But as of now I see now way to do that because of the pH fluctuation issue.Maybe I’ll have to run the reactor at a super low pH when the drip rate can’t keep pace with the demand?</blockquote>