I had a 5 gallon tank previously and never had an issue with ph/ammonia. About 2 months ago I got a 10 gallon tank and before/right after adding fish all levels were fine (I have 2 danios, a mickey, and a molly). About 2 weeks ago the ammonia spiked to around 2.0.
I did a 50% water change, the next day it was still 2.0. So the next day, I used a gravel vacuum, did a 30% water change, and used ammo-lock. Still 2.0. I took all the decorations, plants, and gravel out and cleaned them with hot water, did another 30% water change, and it was still at 2.0. Next day, I used the gravel vacuum again and went to feeding every other day and a 20% water change. I'm worried about continuing water changes and hurting my fish...but I'm also concerned about the ammonia level.
I'm at a loss. Can anyone help me?
PH- showing between 7.2-7.6
Nitrite - 0
Nitrate - 0
Ammonia - 2.0