Just for an example - I started a 55G with 5 juvie cichlids, 2 juvie striped raphaels, and 1 chocolate albino pleco. I never really showed anything on my tests. The cycle was slow but it went without a hitch. You should be fine doing a fishy cycle.
Fishless would be better, but...
I agree with the others that the bioload was so low it most likely allowed only a very minimal colony to establish and that was probably obliterated with the 8 ppm. If you must do a fishy cycle, I'd do a 90% change and then be ready to commit to daily 50%+ changes (been there, not fun) to keep it under .25. The plants won't consume ammonia and the bacteria that develops on them will be minimal at best. Do you know anyone else with an established filter? If so, you can get some of their old media and drastically speed the process. Even someone relatively close that could mail you some? I'd offer, but shipping to Canada is pretty expensive.