Quote Originally Posted by Роберт View Post

APH 09 is Calbe R09, different formulae and with a limited life span of about 2-3 years. It is also dark Brown when buying it because this stuff is not filled of under Nitrogen too.

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I use APH09.

It comes out of the bottle when fresh as a pale straw colour, and only darkens to brown over a period of 2-3 months