There are also posts on this forum regarding the solar fish. One person claimed results near that of a solar cover but I believe the general feeling was not so good.

Solar Fish posts...

http://www.poolforum.com/pf2/showthr...ght=solar+fish

http://www.poolforum.com/pf2/showthr...ght=solar+fish

http://www.poolforum.com/pf2/showthr...ght=solar+fish

http://www.poolforum.com/pf2/showthr...ght=solar+fish