Jandy LXi Ignitor Kit - R0457500 Hayward Pool Filter Stainfree is a citric acid

Stainfree is a citric acid product that removes metal staining on pool liners and finishes

They feature threaded internal connections for pressure testing

Hydroxyl radicals destroy viruses & bacteria like Giardia

Replacement Charger for your Wireless Waterproof AquaPod Controller

So you get the heating during the day (the solar part of the equation) and you get the thermal protection at night (the blanket part of the equation)

Jandy LXi Ignitor Kit - R0457500 Hayward Pool Filter Stainfree is a citric acidProduct Description Jandy Ignitor Kit for LXi Heaters. Jandy Item Code: R0457500 Features Compatible with ALL Jandy LXi Heaters: LXI250, LXI300, and LXI400. NOTE: All replacement parts are Final Sale.