I use Lifegard Aquatics AF-92 Exterior heater modules; I have three in a series each with a 500 watt heater; my 260 is drilled for a closed loop so I used those bulkheads; I run a 1200 gph pump that runs just this loop with the heaters; only two of the heaters are plugged in; the third is a backup; that way there is absolutely no way the rays can get burned; plus I've got a ranco etc heater controller which keeps the heaters honest in case they stick on; plus a lifegard temp alert system with large readout mounted on the wall where I can easily check on it; Yes I'am paranoid about heaters but once you've made fish stew you will be too!


