Pool resource and supply sites

The term "Hot Tub" originally referred to the wooden, barrel-shaped tubs, which became popular in the late 1960s. Early hot tubs were fairly simple devices, which basically held hot water and had enough room for one or two bathers at a time. When the industry began building tubs of molded fiberglass or with thermoplastic shells, they were given the tag "spa" to differentiate them from their wooden cousins.

Replacement info
If your cover has deteriorated over time, heat leaks will occur at the hinge/fold and also on the spa shell rim due to improper seating of the cover edges. More importantly, if you notice that your old cover has become very heavy, this indicates water-logging of the foam-core insulation. A waterlogged cover will have almost no R-value, greatly increasing energy consumption from heat loss. A quality replacement cover will not only save you huge energy dollars, it will also last longer, be more resistant to water absorption, and perform its job better. Find pool cleaners here a great information resource about pool cleaners

If you own a swimming pool check this site for swimming pool supplies. They have information about all of the different types of pool supplies, like chemicals cleaners and how to care for your pool.