Salifert Silicate test shows green result for reef tank

[Bramzor]

I have diatoms so I took an old test and tested Silicate levels. Did it for the RO (nothing found), did it for my tap water and yes, obviously that measured a decent value (measuring a blue color) but when I did the test on my tank, I noticed a GREEN color as the test result instead of the blue tint it should give.

Does this mean I have silicate in my tank or is it measuring something else?

 

[Cwentz758]

I would re test just to make sure. I’m battling the same issue with .1 - .25 silicate in my RO and 0 in the tank....