Spots when I'm dark green?

[Heatheranne]

As I am new to my RETF please tell me...

I have noticed a few white spots on the back and one on the left hind leg of my frog. I can not see them during the day when she is light green. They are only visible at night when she is darker green. I have just recently been photographing her at night and am not sure if they were there prior, as I usually look at her most during the day.

Her habits have not changed and everything seems fine.

Should I be concerned?

I took pictures last night. Please let me know what you think.

I was about ready to head to the store for distilled water. And of I need chamomile, do I use a tea bag?

Also, being I have a waterfall and water base in my terrarium, how often should I clean it and what to use?

How often should I do water changes for the base and what percentage of the water? I don't want to kill the flora if I don't have to.

Also, in a new terrarium or vivarium with a water feature (in case I start another), how long should I wait for the tank to cycle to safely house new frogs?

Sorry for so many questions.

Thanks so much!!!