sucking up my calcium

are there any simple magnesium test out there the one I have is hard for me to use I just dont get it so Im not surte if Im doing it right..lol
 
ok did a mag test today and it is low at 11,000 ppm and I believe the target is 13,000.. so need to run into the LFS and get som mag.. today
cal today is 340 so it went up from 320 2 days ago and KH is at 161.1 ppm
 
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