Has anyone used the Elos Pro line Potassium test?

[Myka]

I wasn't sure if I was seeing results from potassium dosing or not (too many changes in the tank's chemistry to tell what came from where). I was using Zeovit K-Balance Strong. The K-Balance ran out, and I haven't dosed potassium in about three months now as I wanted to experiment with results. The level has dropped around 250 ppm now and has been there for a couple months. Now I'm thinking that I probably did see results, and I'm going back to dosing as soon as I get around to ordering supplement.

What supplement are you using? I am going to try Brightwell Aquatics potassium powder this time around. I generally prefer powders to liquids, so I'm hoping the product works well.