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Re:Odd smell on plants

>I would guess with 95% certainty that it is blue-breen algae (BGA) >growing
>the leaves very near the surface. Lots of light and BGA can fix >nitrogen
>the atmosphere. A little more water movement on the surface >would clear it
up -
>but not so much that you lose a lot of CO2 (you'll have to guess just >how
>surface movement :-).

Hi George, nice to see you back! There is a minute amount of BGA that
thankfully doesn't seem to be going anywhere, at least yet! :-) I turned the
spray bar upwards a little and that seems to have helped with the smell.
It's barely noticeable now. Thanks for the advice, take care.
in B.C.