Tetra Safe Start helps with cycling, you just have to throw in [some] fish after using it. Why not try that, and add the tiger barbs? Let it go for a week or two, check your levels, and you should be fine to add other fish. My 75 was ok after a week of using the cycler, and adding a couple african cichlids to help the cycler along (I used electric yellows so they could hang out with the CA/SAs afterwards, and they're getting along great). You can use smaller tiger barbs btw, as long as you're not starting with huge cichlids of doom.