Orchid Leaves issue?

[Indo Orchid]

That might be mineral deposits from the water, or it might be spider mite damage.
Answer: Yes i suspect mineral deposits i attached the photo.
What are your growing conditions? I actually repotted the entire Orchid in the pot with mixture of Charcoal and Coco husk
Temperatures day/night? relative stable around 26 to 32 degree celcius
Relative humidity?very humid since i live in Indonesia What kind of light is it getting?Indirect light from the window, as i put it inside the bathroom
How often are you watering, and how do you water?
I just water 5 days per week and i will soak it inside pot not touching the leaves just the roots and let the water drain from the pot
Do you use fertilizer? If so, what are the numbers on the label, and how do you mix it? i bought it from online they only mention these ingredients, i usually fertilize it after i water it.