I think keeping new tanks too clean is a problem, it doesn't allow for the natural benthic succession to take place and starves the bacteria and micro fauna, which need to establish themselves in order to create a balanced and healthy biome. This is why we see a lot of dino cases pop up everywhere, low nutrients and a very small bacterial population.
Hopefully things will stabilize soon, just go slow and enjoy. With nano tanks, weekly 10-15% water changes go a long way with keeping things on track.