We have a friend that has a Coleman Hot Tub. Says he has not used it for 7 years and that it worked when he stopped using it. He says he got tired of up keep and he never found himself in the tub, so he just drained it and shut it off. I can not find anything online for this model number. Serial number is 20896..... might this mean Model 208, 1996? Tub appears to be in good shape. He claims that he put RV antifreeze in the tub. When he shut it down. Anybody know anything about this tub??