I added a layer of Fluorite under a layer of Caribsea aquarium sand to my new 20gallon long tank two days ago, I've got the filter going and I have been adding Seachem Clarity to help with dirt particle coagulation and sinking. I did NOT wash the substrate, did wash the sand, so I think the dirt is all from the substrate. I have vacuumed the settled dirt sediment from the bottom of the tank and done a full water change. The tank did clear up about 50% between day 1 and day 2 and because of the water change it's back to how it looked at the beginning.
I have also washed the filter 3 times in a 2 gallon bucket of water, it has been very dirty and made the water totally opaque brown every time.
I'm wondering if I should just let everything settle or keep doing big water changes to stir up the tiny dirt particles and flush them out.
I have been testing the ammonia and it's showing .25 ppm. I know this doesn't mean much right now because I'm replacing all the water and washing the filter. The ammonia is from the substrate, not my tap water.