Thread: cycle pond pump off and on
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Old 06-02-2008, 05:45 PM posted to rec.ponds.moderated
~ jan[_3_] ~ jan[_3_] is offline
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First recorded activity by GardenBanter: Apr 2007
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Default cycle pond pump off and on
On Tue, 5 Feb 2008 15:47:02 CST, wrote:

in closed systems, where filters dont get oxygen the anaerobic bacteria kick in and
their "product" is H2S, hydrogen sulfide which creates the stinky smell of fetid
ponds. this product is extremely toxic to fish and when the pump is started again
the built up H2S is dumped into the pond.

I agree. split the pumps and run a highly efficient one on the filters all the time,
OR, switch to a shallow veggie filter where anaerobic conditions wont occur, Ingrid

Or a filter that is above the pond and drains completely back into the pond
(be it veggie or otherwise) when off. Aerobic bacteria can probably last
longer without food then they can without air, but they do need to stay
wet. ~ jan
------------
Zone 7a, SE Washington State
Ponds: www.jjspond.us

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