Plastic curing tank for curing concrete, suitable for site use, to operate on a 110V supply. Filling the Tank - Ensure that the tank has been filled with water before switching the power on. If this advice is disregarded the tank will inevitably suffer damage. Temperature - The water temperature in the tank should be between 18ºC and 22ºC for curing test specimens for strength tests, as specified in BS EN 12350-1:2009. The temperature should be checked before placing specimens in the water.