Milwaukee Instruments MA913B Double Junction Review

Requires constant calibration, does not hold up well to calibration. Waste of money, now I calibrate it almost every month.

Compatible with Neptune Apex. Seems to work well enough. Drops out more frequently than Neptune's version during calibration for some reason. I have to recalibrate every 4-6 weeks which is normal but a bit annoying.

I bought it because it was cheap and had bad reviews. Don't waste your money, just spend your money and buy better. You get what you pay for. Failed for a little over a month. I use this in my reef tank and it scared me to death, my pH suddenly started dropping dramatically and I thought my tank had crashed. I took the pH probe out of my tank and this white stuff came out of the tip. Luckily I still have my old one that came with my apex, put it back in and the pH is back to normal where it…