Would this compact auto top off system work well?>

[Okguy]

I have the exact same set up that I've been running for 2 years now. But instead of using carboy I use 5 gallon water jugs. That way I just have to switch the jugs out when they need to be replaced. You have to probably use a little more silicon where the airline goes through the lid. I find I have to re-silicon once every 6-8 months to keep a good seal. I also discovered that the seal will last a bit longer if you scuff the lid with sandpaper prior to adding the silicon. Another thing I do is I keep the water jug below my sump, so that I can purposefully add extra water into the sump. Any excess water will just siphon back into the jug (a way to ensure I'm not underwatering when I'm away).

In my tank a 5 gallon jug will last 7 days in the winter and 5 in the summer. To make it last longer, I will set up 2 jugs on the same air pump using one of these.



When I do this I find I can go away for 10 days with little worries (ok less worries).

HTH