My new plaster pool is COVERED in green stain..

[hausfrau]

Did all of that. Honestly, we have tried it all. Still there...a little worse. Is it possible that minerals or something is leaching from the gunite that can cause stains which are almost impossible to remove? The pool's gunite cured during heavy pollen season. The pool is under trees. If the plaster folks did not wash out all of the pollen properly..could this be causing a problem?

[waterbear]

first lets get down to basics....
How are you testing your water?

If, as you say you have "Honestly, we have tried it all." and it is "Still there...a little worse." THEN
I can honestly say that you are trying to adjust your chemicals with imprecise test results or you are just "dumping and guessing". Which is it?

Killing algae is easy if you know the CYA. Raise the FC to the proper level as in this chart
http://www.poolforum.com/pf2/showpos...50&postcount=1
You need to maintain the FC at the proper shock level or a bit above by testing the FC and adding more UNSTABILIZED chlorine at least twice a day and more often if possible. The more constant you keep the FC at shock level the faster you can kill the algae. You keep the FC constant by testing and adding more chlorine to bring it back up to shock level. Run the pump 24/7 and brush the pool to break up any biofilms. You really can't overbrush but use a nylon brush on new plaster.
IF you do this you will get rid of the green very quickly. I have seen pools go from swamp to cloudy in 24 hours and then a few more days for the filter to clear the dead algae many times.

Without GOOD test results you have no idea of HOW MUCH and HOW OFTEN of WHICH chemicals you need. Pool store testing is well and good in some cases but you really can't go running there two or three times a day to get your water tested.

How much did your new pool cost? Now, is around $50-$80 a lot to spend on the one tool that will keep your pool in top shape and save you a lot of money in the long run, not just on chemicals but on protecting the plaster and getting the maximum life out of it? I think not. Get yourself a good test kit! Best bang for the buck is the Taylor K-2006 (not the K-2005).

Algae is very easy to kill but we really need to know current water parameters and NOT from strips. They are just too unreliable, particularly with CYA, CH, and pH.
To kill algae and keep it away we need to start with an accurate and precise CYA reading and need to know exactly which form of chlorine you are using if you are not using bleach or liquid chlorine because it can make a difference.

Hope this helps.

[waterbear]

Did all of that. Honestly, we have tried it all. Still there...a little worse. Is it possible that minerals or something is leaching from the gunite that can cause stains which are almost impossible to remove? The pool's gunite cured during heavy pollen season. The pool is under trees. If the plaster folks did not wash out all of the pollen properly..could this be causing a problem?

In a word, no.
Pollen floats on the surface and does not stain under the water. It can deplete chlorine and allow algae to grow. Your description of the problem and how it occurred and the things you have done to treat it leave no doubt in my mind that you are dealing with algae and just not doing what you need to do to get rid of it. First step is a good, current CYA reading.