My tank cleared up.
I got test kits and everything is normal.
I did a partial water change because it was at stressed.
But, all of my fish like different PH levels, so, i avereged it about a 7.0/7.1
And thats EXACTLY what its at.
Also, the amonia levels are perfect.
I added a tiny bit of aquarium salt to help their gills.
But, it seems that my female guppy is growing something "fuzzy" on the top of her head?

I've seen it happen before, but the fish had been dead for a day or so.
One of my mollies died, but, i took her out right away.
Whats wrong with my fishiiee?