Re: the use of UV filters for algae control

> From: Kevin Conlin <kcconlin at zola_cae.ca>
>  I can't believe that the plants
> are consuming iron this fast, so either the carbon is binding it up (I'll
> test this possibility soon) or the UV is oxidizing Fe+2 to Fe+3.

A long time ago, we used a UV sterilizer (thanks to the well meaning
but money hungry fish store) and determined that is was removing, or
making unavailable, the iron in the water.  Turn it off.