I have located a power backup for my main and refuge pumps 1.3 amps and 1/2 amp respectfully. The batt. run time is estimated at 6 hrs per distributor. Cost is 428 dollars dilivered. This backup is designed for aquariums, and is listed as the 840 Aquarium Guardian. a smaller unit also is available. Here is the link if you are interested. http://www.emergencypowersupply.com/n_1.asp?x=4
