In searching the forum I see several posts that a clear cover is the better option vs blue and black. I am having a hard time coming up with options though as well as a purchasing source. There are 2 on eBay: Magni clear and Ultra therm...but the descriptions look identicle. I cant find the manufacture's website. They also say "above ground" in the descriptions - is there really a difference between above and inground covers as I have an inground fiberglass?

Ultra Therm:
http://cgi.ebay.com/15-x-30-Oval-ULT...QQcmdZViewItem

Magni-Clear
http://cgi.ebay.com/Above-Ground-Mag...QQcmdZViewItem