Polyscience IP-60 Low Temperature Cooler, 1.5" Rigid Coil Probe nut-base-grow but the manufacturer recommends starting

but the manufacturer recommends starting the dosage at just 6ml per gallon — because of the taste — and slowly increasing to full strength over a period of a couple of months

Agency (National Recognized Lab) cUL

6% Acid is in the high concentration range its slightly less azeotropic than 67% Nitric Acid which means it fumes less because the water and acid are not at the maximum boiling point

and the thickness is 38mm

Complete with 2X 1/2" NPT accessory ports

Polyscience IP-60 Low Temperature Cooler, 1.5" Rigid Coil Probe nut-base-grow but the manufacturer recommends startingPolyscience IP 60 Low Temperature Cooler, 1. 5" Rigid Coil Probe ***Note: This item has a possible lead time of 2 3 weeks depending on stock availability.*** Specification Description Immerson Probe 60, 1. 5" Rigid Coil Working Temperature Range C 60 to 20 Temperature Control (C) Fixed at 60 Working Temperature Range F 76 to 4 Working Temperature Range C 60 to 20 Temperature Control (F) Fixed at 76 Temperature Control (C) Fixed at 60 Maximum Ambient