I wonder how many Chemistry threads start out with the title of "Ooooops." I'd imagine not as many as should...lol. Well, I did something stupid and am hoping for some advice. About every 2 days, I mix up 2 or 3 gallons of Kalk Water. Let's see, today's Friday so it must have been Tuesday. Yes, on Tuesday, I grabbed one of my gallon jugs, poured it into my drip jug and set it up dripping into my sump over night. This morning, I had to move a couple empty mixing jugs for some reason. Low and Behold, there's the empty gallon jug that I used Tuesday night....labeled....Mg Supplement!!!! Yep, I dosed almost an entire gallon of Mg Supplement (Randy Holmes recipe using just Epsom Salt) Well, I rushed to my tank and everything appears to be just fine. In fact, everything actually looks really good....lol. Anyway, I realized this right before having to leave for work so couldn't do anything about it. I'm home now and just tested my Mg. I'm not sure how to read the results. I am using a Salifert test kit. Using the 1 ml syringe, I drew the Mg-3 reagent in as instructed. I then emptied the entire contents and still needed to add more. I drew the reagent in to the syringe again, fill the syringe the same amount I did the first time. From this I added until I got my color change. Holding the syringe tip up, I'm reading the plunger at .78. So, the first full syringe puts me at 1500 ppm. .78 would put me at 330 ppm. Does that mean that I'm at 1830 ppm? Normally, I try to keep my Mg at about 1330-1350. Obviously, I'm just a tad bit high!!! Any suggestions on what I should do? Any advice would be great!!!