Based on the info you giving, you don't seem to have a lot of corals, so I don't think dosing is even necessary for you. I would just try different brand of salt and do a weekly water change. Things should be back in balance again. Good luck!
Just for fun... you can get the link of the photos and upload to this website http://fotoforensics.com/
click on metadata and it will tell you if the photos have been through software such as photoshop, picasa.. etc..
A. Plana Crayola - Color on this one is crazy
A. Desalwii table Orange Branch and Purple Tip - Got this as a wild colony the purple tip getting darker and darker each day.
I'm addicted to acropora especially tabling acropora. Below are some of my collection I like to share. I bought these wild colonies a few months back, it browned out at first but it begins to colored up nicely.
Acropora Plana
Acropora Efflo Baby Blue Tip
Acropora Plana - Same species as the first one but branches are smaller