Jandy stain remover

[mbar]

If all those things didn't work, then I would get in touch with the company that put in the pool - maybe something with the plaster - They would probably be able to help you out. There is also a stain kit by Jack's Magic that helps to identify stains. My opinion since your pool is new is to get in touch with the contractor and ask his opinion.

[Guido]

Thx a lot Mbar,

I dived down to the stains for a very close look and it looks like that the something is coming trough the plaster. I also saw 2 spots were the plaster has holes which appear to me as if there are leaves under the plaster. I called the builder and he promised me to come out to inspect the plaster. (Sure the question is when)
Well we will see what happens.

Again thx a lot for your help.