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- Jun 25, 2020
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So my tank is just under a year old and thriving but I am confused as to why my alkalinity spikes are every other day when I am dosing the same daily amount of AFR and supplemental alk. Numbers are attached. Salinity is actually 35 based on calibrated refractometer I’m just too lazy to change it in Apex. PH runs 8.1-8.4 daily. Skimmer with CO2 scrubber turns off at 8.35 so it doesn’t get too high. I have a frag tank(20g) attached to the main system(180g with 40g sump) that runs opposite hours to help with keeping ph more stable. Is there a reason why my alkalinity spikes every other day as opposed to daily? I’m wondering if it has something to do with AFR having to be broken down for alkalinity or the frag tank but I just can’t come up with any solid hypothesis. @Lou Ekus maybe you have some insight?
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