Lyle, by the time you go on vacation your discus will be big and old enough to just let them be without any feeding and waterchanging for just 10 days .
Your tank is huge and understocked , your discus are already half grown and on top of that it's only a 10 day neglect .
On your original question , I can't offer to you any valuble informaions because I don't have any experience with constant drip systems .