Zimmanski
Aquarium Advice Addict
Pwc is the way to go, just refil the water slowly not to agitate it all again. Running the filter won't harm anything but may cause your filter pad to look prematurely gross haha. I just put fluorite in my 20 long and don't cloud at all, but I also put the fluorite in before I put water in the tank and I think that helped out a ton. I have crystal clear water since the first gallon was added