Green Corals?

Today i noticed my finger and toadstool, amongst other corals slightly green in places, only thing i can put this down to is last night i did a water change, when the water was ready the salinity reading was almost 1.040, so i added to the change water 3 x litres of bottled water, volvic, i did not want to use tap water, which brand the reading down to 1.026 my tank was 1.025 so i went with this.
Could this be the bottled water causeing these sick looking corals?

 

Maybe it had something to do with the content of the Volvic water....
Here are the contents in mg/liter

Calcium (Ca) 10
Chloride (Cl−) 8
Bicarbonate (HCO3) 65
Magnesium (Mg) 6
Nitrate (NO3) 1
Potassium (K) 6
Silica (SiO2) 30
Sodium (Na) 9
Sulfates (SO) 7
TDS 109

Im not sure about how some of these would effect the tank, but someone else might be able to help even more now.

 

Thank you yuri.

 

Bottled water can also contain copper.

 

Any pics? some of those elements in that bottled water is as bad as tap. TDS 109 is unacceptable in a tank and the silica and sulfates. Now, normally Corals aren't going drastically change over night. Let things run their course and in the meantime if have any Coral food (plankton etc.) feed them every other day for a week or so.

 

Bottled water is often worse than tap. Did you at least treat it with anything (prime)before adding?

 

Yes i know of and did treat with water treatment first, only did this because i had already took the water from the dt and it was after 6.00 of which my lfs was closed...

 

Next time you need "emergency" water stingray, just use plain ole distilled, it should be pure and most brands or companies DO NOT add minerals to taste, where as many water comps, add MgSO4 and KCl or CaCl2 or other minerals so it doesn't tastse too pure. At this point I wouldn't really worry about feeding the corals because that is one more thing to add to the bioload and potentially the problem. I would give them a few days and go from there

 

Most of the time it is tap.