"Go Fig" wrote in message
...

For years here, some posters here have singled out UVs for this
'natural' argument, I don't get it... what could be more unnatural than
an electric water pump ???

IMHO, a UV light only addresses the symptom, suspended algae, rather than
the cause, a high nutrient load. An electric water pump that provides
sufficient water circulation/gas exchange, as you know, helps increase
Oxygen levels so that the natural processes can function better to reduce
the high nutrient load. To me, clear water (without using UV) is an
indicator that the biofiltration/Oxygen levels are sufficient to handle the
given bio-load. The result being better water quality, which, as we all
know, goes a long way towards preventing disease. A veggie filter, IMO,
helps take the load off the bio-filter. Some people use AZT, which, as you
know, provides the enzymes/bacteria to help speed up the biochemical
processes. IMHO, Oxygen is the key element to make all these things happen.
Low DOC (Dissolved Oxygen Content) and things start breaking down.