[Canadian]

I tried to keep a Rainford's Goby on two seperate ocassions several years ago. They were the only fish I ever owned that I couldn't keep alive.

They have incredibly fast metabolisms, and as you're already well aware they like to jump. Historically the problem with them has been that while they do have fast metabolisms they also often arrive with internal parasites. Couple that with their high metabolic rates and they often starve. This problem is compounded if the fish was collected by poor suppliers and then sold to equally poor LFSs.

On both occasions mine fattened up quickly once they had been in my tank for a week or so. However I never witnessed them eat prepared foods. After about 3 months they appeared to be maintaining a very good body weight, but then slowly deteriorated and I was never able to keep them alive for more than 6 months or so.

My experience may have been tainted by the fact that I purchased both of mine from a pathetic LFS in an attempt to save them. They're one of my favorite fishes - they're very unique and have great personalities. I hope you have better luck than I did.