Another option would be to add a little salt to your makeup water everyday. That way the salinity will slowly rise.
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75 Gal. display with 40 Gal sump - Dual 1.5" drains, Aragonite sugar sand substrate, SWC Extreme 250 Cone Protein Skimmer, 1800L return pump, 4 AI SOL LED Lights, 250 ml pellets in a recirculating bio-pellet reactor, BRS Doser pumps for Calc & Alk, Tunze Osmolator Auto Topoff system connected Vertex Puratek RO/DI.
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