Does anyone know of another test to run on my water? It sounds like the fish store can only run the same water tests that I can run with my test kit.
Update as of tonight - Ammonia and nitrites still zero - water has cleared up, although it never really got that cloudy - you could only really see cloudiness when looking at it the long way. Once again it is crystal clear. The 4 remaining danios are doing extremely well - eating like vultures every time I put food in there, swimming all around and looking like they are really enjoying their lives.
Short of running additional tests on the water, the only other thing I can think of to do is to replace the 4 dani's that didn't make it and see how the new ones do.
PLEASE do not flame me if you disagree with this as a next step - I am honestly trying to figure this out with the least amount of impact.
Sheesh, this is turning out to be more than just putting a couple of fish in a bowl....