i let the tank cycle for about 3 weeks, just recently added the fish.
I don't have a water testing kit, so i jus brought a sample to a lfs, and they did the test strip test. not really helpful, but it read the nitrites where up a bit, and everything else was fine, couldn't really get a number. They suggested to do a water change. Since the tank has been up I haven't did one yet. Do you think is about time?
I had the water tested with the same test maybe 4 days ago and it read 0 nitrites, and everything else fine.