I've read (not on this site) about the floating theramal blankets like the one linked below saving electricity bills for hot tubs? Do you think they are helpful in saving money if you already have a decent cover for your hot tub?
Amazon.com : Thermo-Float 16-mil 8ft x 8ft Hot Tub Bubble Cover Floating Spa Blanket - trimmable Heavy-Duty Insulating Solar Heating : Garden & Outdoor
Amazon.com : Thermo-Float 16-mil 8ft x 8ft Hot Tub Bubble Cover Floating Spa Blanket - trimmable Heavy-Duty Insulating Solar Heating : Garden & Outdoor
www.amazon.com
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