RuggedMesh Mesh Rectangular Safety Pool Cover 18 x 42 Feet pool-dimensions_18x38 Since it is a solid

Since it is a solid cover

This Aladdin part is manufactured by a Poolweb partner to meet or exceed original manufacturer specifications

Maximum pressure rating is 150 PSI at 73 degrees F with a maximum operating temperature of 140 degrees F

then calcium hardness in your pool

This is a Hydro-Air Air Control with Handle for Spas with a 1 inch socket fitting

RuggedMesh Mesh Rectangular Safety Pool Cover 18 x 42 Feet pool-dimensions_18x38 Since it is a solidThis Meyco pool safety cover is designed to fit a Rectangular 18 x 42 Foot Pool. The actual cover will arrive larger to give you enough overlap around the entire pool for proper installation and use. Meyco's RuggedMesh Safety Covers are developed using a mesh material built to offer a unique combination of UV protection, filtering, superior strength, light weight and ultimate pool protection. The mesh material's special weave allows water to drain