Thanks for the compliment. Over the years you run into all sorts of odd situations and spend a lot of time trying to figure out what you believe is the best solution. Since I used to often install and maintain these show aquariums in people's homes and business that knew very little about the system other than that they were very pretty, I spent a lot of time on redundancy, automation, and general cleanliness. No sense in re-inventing the wheel if it has worked before, though there is always more than 1 correct answer to these sorts of questions.
Anyways, I have used a 1:3 or 1:5 (can't remember which) mixture of vinegar and water on drains dedicated to skimmer output before. I would do this once every 2-3 weeks depending on the skunk-iness of the skimmate. In one case we had a particularly bad problem with the smell coming from the skimmer drain. The customer was very unhappy so we scouted online and somewhere found an electronic valve (like
this one though I don't remember the exact one we used) which we plumbed to a water line and let the controller turn the water on for 20 seconds once every 3 to 4 hours. That, combined with the vinegar treatment every other week, kept things clean and knocked any smell right out.
Also a bag of carbon over any drain vents can help with the smell somewhat as well.
