the higher the watts the bigger the tank it can be used for, this is were the t-sat comes into play, hook it up to the heat mat and set the temp..but some one with more experience would be better able to awser...
Quote Originally Posted by Alt-tab
when buying heat mat's how do you know which mats will emit which levels of heat , all they seem to say on web-sites are the wattage ? is this pre-determined by manufacturer by the area they cover ?