I switched to Tropic Marine Pro from IO, and just switched doing my weekly 5 gallon water changes. I did not notice anything change good or bad with the slow change (other than dosing less  )
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60 Gallon rimless, internal Herbie overflow, ATI Powermodule, Eheim 1250, 2X Tunze 6055, Tunze ATO, Euroreef RS100, Profilux controller, TLF Reactor.
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