Thanks Delapool. I'll recommend the kh gh
test kit. There could be a lot going on with the water. They have new pipes in the neighbourhood. Hopefully it settles over time. For the moment the ph is over 9. The tests have been compared to bottled water and the test kit has no problems.
One of the neon tetras had a growth on it's lip that just busted. It's being treated now for fungus that is now growing.
From other reading my friend has done they're thinking that the platies might have tuberculosis. Hopefully that can be ruled out.