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Dennerle algae control


>Date: Sun, 23 Nov 1997 11:52:28 +0000
>To: Aquatic-Plants at actwin_com
>From: Ernest G Austin <ernest at haga_demon.co.uk>
>Subject: Dennerle algae control
>MIME-Version: 1.0
>X-Mailer: Turnpike Version 3.03a <r8j6YXzem7CvE3iA5gyBlAK5uZ>
>    Some eighteen months ago I received some booklets issued by Dennerle
>which appear to provide additional information on Dennerle philosphy.
>Quoting from their booklet "Algae problems? We solved them long ago"
>    " ... alga love an oxidising environment, they develop particularly
>well and produce more and more oxygen, far too much for the fish to
>consume in such large quatities.
>    Algae quickly succeed in raising the oxygen level to 20-30 mg/l.
>Contrary to popular opinion, such high levels are unnatural for fish;
>for most aquarium fish the oxygen level of their natural habitat is only
>2-3 mg/l.
>    Excessive amounts of oxygen will quickly destroy natural chelates:
>the water will become more "aggressive".  The excessively high oxygen
>content destroys the essential vitamins and renders the trace elements
>inactive.  Plants, as well as fish, will then suffer from trace element
>and vitamin deficiencies.
>   Because the conditions are ideal for algae, they will displace the
>aquatic plants more and more.  Little by little, the plants will die as
>a result of such unfavourable living conditions."
>Dennerle advocate regular measurement of oxygen.  The remedy for excess
>(not sure what Dennerle considers excessive) is to reduce the lighting
>Comments anyone?
>Ernest G Austin