Well i'm about 1.5 months maybe less with my fish. At the beggin i added fish and didnt give it time to cycle fishless but whatever. It's been about 1.5 months now and my ammonia lev was always above and been doing regular water changes, my fish look happy. Just this week i noticed that i was getting brown algea which is fine i dont care. But now all of a sudden i tested my water today, Ammonia was at like 0 or maybe .1 but my nitrite is now at like 2.5 or 3 i think that's werid, i cant test for nitrate cause my test dont work that i bought but, what's a good thing to do ?