Natural Chemistry Stainfree™ 1.75 lbs Size:1.75 lbs Enersol Pool Heaters are a

Enersol Pool Heaters are a one-time investment

316L stainless steel is used in the construction of our heaters

When th light on your existing above-ground pool burns out

It's available for easy use with Valve Actuators for automatic operation

Metalfree​ does not raise phosphate levels in pool water like many other stain and scale products

Natural Chemistry Stainfree™ 1.75 lbs Size:1.75 lbs Enersol Pool Heaters are aSafely Removes Metal Stains from Pools Stainfree is a citric acid product that removes metal staining on pool liners and finishes. Stainfree is ideal for treating staining on all pool surfaces and is compatible with all sanitizing systems. Use Natural Chemistry's Metalfree and you have the ultimate 1 2 combination for stain fighting! Natural Chemistry Item Code: 76015NC Details 100% citric acid. Removes metal stains from pool liners and finishes.