Many people use Zebra Danio's, but why use fish at all, you can buy ammonia from a hardware store a lot cheaper than fish from a lfs, you can control how much ammonia is in your tank to keep the optimum 2-4ppm to cycle with, and you won't be unnecessarily stressing any fish?
There really is no reason to do a 'fishy' cycle any more!
Just read your penultimate post, lol, sorry for laughing, but thats exactly how I felt the first time I used Stability, didn't read through the instructions and was dosing for 2 weeks before realising I wasn't shaking the bottle enough. Give yourself a slap on the side of your head and move on, we've all been there at sometime (and sometimes more than once)!