Maybe you need more Chilis for them to be comfortable? I have 16 or so in my 15 gal. that I got from her, with 7 CPD, and none of them are jumpy. There are a lot of plants, and water lettuce floating, so that might help make them more comfortable.
I had a 10 neons in it previous to that, and seemed like they wanted a bigger tank to zoom around in, so I rehomed them, and got the Chilis and CPD.
Before the neons I tried 6 cherry barbs, but they really zoomed around, a couple were very territorial. A friend took them for a 40 breeder where they are very happy.
The CPDs and Chilis seem perfectly happy in the 15. I also have Cherry shrimp.
Last edited by daylily; 09-25-2013 at 03:11 PM.