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I managed to set mine but it was so troublesome I returned it the next day. It's not that hard to set and the instructions with mine were pretty clear. We used to get a power outage once or twice a week and it just wasn't worth the hassle to have to program every outlet each time the power went out. The simple $9 appliance timers that WalMart sells are much easier to set and you can buy 3 of them for about the same price as the Coralife unit. I've never needed more than 3 timers for a single tank 
