Sorry I read potassium as phosphate.. my bad :( Hanna also has a potassium check as well for soils ,dont know how good will it work for water... BTW what is the reason for testing potassium anyway?
Hey buddy...
Neways coming to the topic.Recently i was going through a thread in a differnt forum where the guy has mentioned that a certain batch of RSCP salt was found to have very high dkh.. #manufacturing problems
Maybe because they dose other traces that hav some iodine component in it...or maybe iodine is replenished through water changes... It is reported by Julian Sprung as i read frm his book that Iodine is essential for Xenias and Anthelias ...
Btw can Kalk contain iodine traces ??if yes..then that...
I don't agree with Boomer on this fact. Xenia and Anthelia need iodine for their survival...and some aquarists even target feed their xeniaS with iodine..