The same thing happened when I cycled with fish - my ammonia never went above .25 - took over 2 months to cycle - with 5 goldfish (which I didn't keep - this was before I knew about this forum & learned better).
Originally Posted by cgrroutley
Even after you add the plants though, I wouldn't add anymore fish until your parameters show you are cycled - ammonia will be at 0, nitrites at 0 and you should have a small reading for nitrates.
46 gal fw tank with black skirt tetras, neon tetras, spotted corys, green corys, 1 guppy, cherry barbs, otoclinus, snails & 4 amano shrimp - plastic & live plants
5 gal QT with green corys & 2 guppies