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 : Spa Depot Thermo-Float 16-mil 8ft x 8ft Hot Tub Bubble Cover Floating Spa Blanket - trimmable Heavy-Duty Insulating Solar Heating : Patio, Lawn & Garden
Amazon.com : Spa Depot Thermo-Float 16-mil 8ft x 8ft Hot Tub Bubble Cover Floating Spa Blanket - trimmable Heavy-Duty Insulating Solar Heating : Patio, Lawn & Garden
www.amazon.com