I purchased this tub a few months ago and my electric bill jumped up from $60 to $110 the first month and to $145 the second month. I called the dealer and was told that the tub could not be the cause of such an increase. I checked the filter cycles and they were set to 90 minutes and 30 minutes which is the factory default. Also, I have had to add water twice already. The second time I added about 15 gallons and it has gone down 3/4" in 3 weeks. So I am not sure if this is normal o a leak as I am a first timer. During installation, it was also discovered that the wood in the inside of the side panels on the front of the tub were all wet and full of mold. I was told it was shipped on its side and rain got in it. I am worried that there are more issues going on. Any one familiar enough with the fibercor insulation to know if it would absorb water if there was a leak and lose its insulation properties. Any advice would be appreciated. Thanks!!