Pool Cover Source offers this new Concentrated Pool Antifreeze, which gives you great winter protection at a lower price! Our pool antifreeze is concentrated so 1 quart mixed with 3 quarts of water will make 1 gallon of antifreeze that will protect pool plumbing down to -40 F. Want even lower temperature protection? Just add less water. This antifreeze comes with a dilution chart, so you can make the strength you desire. We recommend -40 F to be safe. Concentrated antifreeze is totally safe for swimming pool use and is non-toxic. Use one gallon for every 10 ft of 1.5 pipe. Safe for all types of pool plumbing. 100% Propylene Glycol.