More and more the level of Potassium is becoming main streem. I belive within the next couple of years you will see more and more test kits on the market. With level in NSW being measured at or around the same levels as CA, it must play a role in the reef environment. Origonally the Zeovit system put a lot of stock into the level of Potassium and there fore Reefers Best Salt also was created with good levels of Potassium. Now also Deltec H2O salt clames higher levels of Potassium.
So the long and short of it is I think it plays a role. That role is yet to be determined and it might just be on the edge of becoming another important ellement of your water
J
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