ya i know that. im just trying to ask if using a timer to off the chiller in the middle of the night as the weather is not hot mah .. so can reduce num of kick in during the night. And im just Asking for advises.. As i did not want to mess up my tank, so i ask first. And what he tink he is? Only he wont take marine as a joke ? Just a simple question if he choose not to reply then so be it.. what must he give comments about me ? Just dont like the way he talks