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Old 15-10-2010, 17:58   #1
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Adding Yeast to Holding Tanks ?

I know that adding yeast to septic tanks on a monthly basis is supposed to keep the microbial process going. Has anyone any experiance with doing the same thing for holding tanks? On the face of it, it seems like its a workable idea.

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Old 16-10-2010, 07:26   #2
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You might find something like Aqua Zyme to be rather more effective.


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Old 16-10-2010, 08:04   #3
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Google up Peggy Hall, the "Head Queen."

She has written the book on holding tank odors.

She is a believer in biotic additives to reduce stink.

"GET RID OF BOAT ODORS" Get Rid of Boat Odors: A Boat Owners Guide to Marine Sanitation Systems and Other Sources of Aggravation and Odor (9781892399151): Peggie Hall: Books: Reviews, Prices & more
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Old 16-10-2010, 08:11   #4
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Originally Posted by hpeer View Post
Google up Peggy Hall, the "Head Queen."
Peggy developed Raritan's K.O. ➥ Raritan Engineering | Cleaning and Maintenance Products/K.O. Kills Odors

Here's what she says about K.O. and Odorlos:

K.O. is live bacteria that needs a good supply of oxygen from an external source (vent line) to function aerobically. The active ingredient in Odorlos is nitrates, which encourages an aerobic condition in the tank by promoting oxygen release from organic matter (in a holding tank that means the waste itself).

Because K.O. is a bio-active (live bacteria) product, it's "self renewing"...the li'l buggers don't wear out, they you shouldn't have to add between pumpouts. Odorlos, otoh, does exhaust itself, requiring a new dose at least every 5 days or even more often in especially hot weather.

So while I especially like K.O. because I developed was the very first bio-active tank product, I'm a realist...not all tanks get enough oxygen from the vent to let it work. So when I don't think it can, I go with Odorlos.

K.O. and Odorlos are the ONLY products I like, btw...they're both 100% enviro-friendly and where one can't work the other usually can.

Odorlos ➥
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Old 16-10-2010, 08:15   #5
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You'd want to hope it doesnt rise too much...
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Old 16-10-2010, 09:46   #6
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My thoughts exactly !
Memento,homo, quia pulvis es, et in pulverem reverteris.
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Old 16-10-2010, 09:48   #7
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The practice of adding yeast to septic systems originates with vacation homes where the systems go unused for long periods of times, where additional organic material is needed to keep the bacteria that consume effluent healthy. It would be counterproductive to add yeast to a holding tank that is used regularly.

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