I use kalk, what brand ru using? I've found that the clearest solution is from the BRS pharmaceutical grade kalk. I also dont dose as much. I'm at 2.5tsp per 5 gal of water.My attempt at kalk dosing has resulted in a messy ATO reservoir. I only used half tea spoon per gallon. Any suggestions? Tips?
You can also skim that film off the top after the kalk mix has settled. It's also going to need a lid on the reservoir as contact with air will render it useless