Quote Originally Posted by ScorpiNO View Post
Those are not very reliable and the drop testers are less expensive over the long run. Once you get your levels in check, just test once a month. That is unless you have a large enough demand for CA Alk and Mg.
good to know, i was unsure about the reliability. that was going to be my next question...if i had found any for sale. thanx for the info...

~alex