is Potassium required for reef???? Help??

[Myka]

I recently got the KZ kalium kit as well, and was a bit miffed by the way you test it. Kinda weird. I tested old water that I saved from my 33g before it transferred here, and then tested my 90g that i have here now. Both were around 240 or 250 ppm. I haven't figured out which product I'm going to use to supplement, but I'm excited to hopefully see some results. I'm interested to see if there will be any difference in my tank since it is 95% LPS.