I had a cooler put holes for tubing. I put copper tubing inside the black tube so that nothing would happen to my nutes. I was wondering if i got a cooler that i can plug in it would keep ice from melting and keep resivor in the 60s. Cause it worked good on the weekend when i was there to change bottle of ice when it melted but on weekdays when im at work it would get warm again. So does anybody have any thoughts on this?