Looks like chronic over water and pH problems.

Also, looks like its beyond salvage as well.

Note the purple stems from the base stem to the leaf. BAD NEWS.

Once those fans drop, you have nothing to power the plant flowers. And those flower tops will just stay tiny and dissapoint.

I use lava rock in the bottom of my containers and water only from the bottom. The lava soaks up the water and then the soil soaks water from the rocks.

The roots go where the water is. Deep roots are good and the lava dries out first and will in turn soak back the water from the soil.

Keeps it going in a nice cycle and the soil never gets soaked and nutes dont get washed away in the watering process. Plus you WILL get bigger buds.

Always water first thing in the morning so the plant can respirate the water thru out the day.

Also, plants love to be misted with clean water. A water burn spot here and there hurts nothing. They thrive on misting.

Good luck and sorry bout your plants.

Live and learn.