Ok let me throw this out here, I have never found a magnesium test kit that I like and by like I mean one that actually changed color/gave me results. And phosphate has been 'so so' where simple ones have a huge range for the smallest amount (i.e. 0 to 0.25 ppm). Now I recall reading a ReefBuilder article about water testing machines, and I seem to recall there was at least one bay area LFS that was demoing it, for like a buck a test you're good to go. Did that die out a long time back or what? Or any LFS do testing, even for a cost, I ask because frag swap I'll be in range of a few stores I normally don't get anywhere near, and I could bring a sample of water. Also any recommendation on a magnesium test kit? preferably something simple, whenever test kits require a specific amount of a reagant be added with a spoon and that spoon is super tiny I feel like I can not get any sort of accurate results (even if I were to get results), my last one had me adding drops until it changed color, I passed 2500 ppm before I just gave up on the kit).