i curently have a 300 (96"x24"x30") set up.i have another 300( 74"x28"x36") sitting in my garage.currently im using a 44 gal garbage can as a filter.what im looking to use to bring the second 300 on line is a 300 gal stock tank and filter both tanks with this.in a system of this size whats the best way to heat it? im planning on insulating all 3 tanks.(wife is *****in about my energy consumtion)