I think this is just too much worry and money for the good points it brings.Heat rocks are all potential dangers,especially with water near,they can overheat,the stat may not be accurate,there can be short-circuits,fire hazards...I don't think leos have these in the wild :lol: ,it would be better if you want to provide them during the early hours of the evening with a bit of radiant heat,to place a flat normal rock under the hot spot,heat will remain for about 1 to 3 hours,depending on what sort of rock you use.Granite flat rocks store heat quite well. :wink:apaz69 said:i give up no ones listening.
dont go to far on a boat as plop you will fall off