Amin shelf life

[vladaruz]

Hi, recently I bought a Amin amino acids at my LFS to try out in my tank.
When I opened the bottle, there was some brownish flakes in the bottle and the liquid was not clear.
Is it ok to use it or I should return the bottle? And what is a shelf life after opening the bottle?

Thanks!

 

[Fauna Marin]

HI , a few Flakes are quite normal , but the solution had to be clear not turbid, If the smell is also very bad then send the bottle back and ask for new one