[APD] Reduction of nitrate.

[Paul Krombholz <pkrombholz at bellsouth_net>]

Quote (Stuart Halliday):

> I've not added any more ammonia and the nitrite level is not reducing.

That makes sense to me.  Nitrate reducing bacteria don't reduce nitrate
except in an anaerobic environment, and I wouldn't think that there would be
any anaerobic areas in Stuart's experimental set-up.  
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