Hi, this is my first post but it's been months I'm reading to this forum. My question is : I've bought SN some months ago from Poland (500g in a plastic bottle). But I've opened it to put 2 x 25g in little plastic bags to make it discreet. Then I've read that contact with air can be problematic. So I've ordered another bottle, but yesterday I've got an e-mail from the company saying they cannot send it to me because of legal reasons... It just made me more afraid... I've opened the bottle around 15 days ago during 15-30 mn i guess (don't remember exact time). Do you think it is still good to ctb ? What about the aquarium test ? Can you please tell me which test must i buy ? Thanks a lot for your answers because I'm in very high troubles (physically and mentally severe illnesses) and sorry for my bad english