Just got them in and I love the Calcium and PH test kit. Magensium seems to be a little tricky but I'll get used to it. I stay with salifert in regards to Alk. I love how the color testing is more distinct making it easier to gauge. I think I'll get the Alk kit to see how it matches up. Since it was created by Elos it shows by the packaging. Just wanted to give everyone the heads up if they ever wanted to try another test kit. 
