Cryo-Tek 100 Anti-Freeze / Glycol (5 Gallon)

I have a several clients with outside loops on their hydronic systems and using Cryo-Tek 100 seems to keep the system cleaner than straight softened tap water. I do monitor pH on a regular basis and adjust as necessary but running a mixture of 50/50 Cryo-Tek 110 and softened water has kept these boilers running free of calcium buildup. Today I opened a Triangle Tube, Prestige Solo 110 system for heat exchanger inspection, that has been in service for 17-years. Virtually no scale at all. little bit of black, iron oxide within the deaerator screen from a couple of pieces of black pipe used within the system during installation. I truly believe it is the Cryo-Tek that keeps these systems so clean. The price over the years has gone up to the point, many customers are electing not to replace during the 5-year system flush. So, we'll see how that works out for them.

I have a closed loop heating system that i need antifreeze protection down to -20 degrees. I purchased this product because it is supposed to have freeze protection down to -70 degrees, which I tested every pail and I was only getting between -46 to -48 degrees?? So, I'm having to use more of this product to reach the required protection!! If the product is stating this on the pail that 100% undiluted will give you -70 degrees freeze protection then every pail should read -70 degrees when tested correct?? I calibrated my refractometer before i tested each pail !!