Sick Phalaenopsis problem with roots HELP SOS

[George9999]

I have 3 phalaenopsis and all three having problems. I have problem with the roots maybe because of too much water roots gone gray i cleaned up and cut the roots but i don't know what to do more cause i see some yellow marks on the leaves and spots gofry like (no water symptom)

I have another phalenopsis roots are green but leaves go down.

I don't know if i have to repot or stop water

Thank you