[Support request] Adding cal mag To Parent Forum March 1, 2022 at 2:09 pm #986 Richd3160Participant I’m using the autopot 4 pot 3.9 gallon setup. Can I add cal mag directly to the din trays instead of the reservoir ? How would I calculate usage ? March 1, 2022 at 2:11 pm #1001 JoshKeymaster It would be much simpler to add the Cal Mag to the reservoir, not sure why you would want to pour this solution into the tray. Not advisable You must be logged in to reply to this topic.