I've been all over the tftestkits.net website and I can't find where to buy the calibraiton powders for the blue digital pH test meter. The yellow one I ended upgetting on my second purchase is all over the board with its results and rarely consistent with the blue tester. The blue one has to be calibrated using three different pH powder mixes that bring a set amount of water to a designated pH so the meter can calibrate to those exact standards. Anyone know how to get those powders? That said, the blue tester is now reading 0.3 off of the liquid comparator block but I can't stand thoes blocks. "What's my pH? Well somewhere between these two colors which are 0.3 apart. I think." I like the meters.
...Ironically, I can't find the digital pH meters on the website either.
...Ironically, I can't find the digital pH meters on the website either.
