My tank requires about 40ml alk and 35ml calc using Seachem Fusion 1&2. I don’t have enough room for a calc reactor and I’m trying to find a way to cut down on 2 part costs. Seachem seems pretty concentrated compared to other brands cause when I plug in my amount it converts to almost double the volume when using BRS or Esv. Does anyone know of a cheaper 2 part or should I just supplement with some kalk?