If you keep water moving with a pump eventually heat from pump will cause the alk to precipitate leaving residue and dropping alk and pH levels anyways.
I wouldn't use any source that puts out heat like a pump, if u really want to keep pH up use a airstone.
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Water Quality: NO3 0,Phos 0,Cal 440,Alk 7.5,Mag 1300
"Reef Fast, You Crash, Reef Slow, You Pass" Mike's Reef 3:16
Current Tank Info: 350g DT,95g sump, 50g Frag tank, 4800gph return 4x Sea swirls. 6x AI Vega Color. 200# Pukani rock, dual recirculating skimmer, Biopellet, GFO Carbon rx's, Cal rx. Closed loop. 1.5hp chiller, genesis renew. Apex & RKE
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