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Old 05-06-2014, 09:12   #16
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Re: Smell Killer

Even easier, the pet section at walmart (or pick another pet store if you have aversion to walmart) I'm betting the fisherman pump will be 3 times the price because it's "marine grade".

Most municipal waste treatment plants use this exact approach on an industrial scale as part of the treatment process. As long as you get a decent amount of oxygen into the water, it will work.
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Old 05-06-2014, 09:16   #17
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Re: Smell Killer

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I can't get to the inside of the upper vent to replace os increase size. I would have to remove propane locker drains etc big deal. I have yet to find a location for a second second vent, harder than it seems. Air injection seems to be a solution.
Currently if I use a couple hundred dollars of treatment a year and the problem goes away, unfortunately marine runs out of the stuff every summer.

Since your topic is about air injection, presumably to promote aerobic bacteria action... I'd assume you're all over which specific products might work best. OTOH, if not, maybe re-evaluating your choice or product could be useful, too?

-Chris
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Old 05-06-2014, 09:41   #18
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Re: Smell Killer

I ran a system just as suggested for 2 years (testing for Practical Sailor). The smallest pump will be fine. Just run a small rigid tube to near the bottom, no diffuser. Worked fine, the second lowest odor of any sollution tested (better than big vents), trailing only vent filters.
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Old 07-06-2014, 13:49   #19
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Re: Smell Killer

have any of you guys tried Pure air its a spray that eats orders..
I would not go to sea with out 2 cans pump spray .
Really does the trick lee / fla
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Old 07-06-2014, 14:30   #20
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Re: Smell Killer

How about pumping out the holding tank once in a while rather than building an aeration system?

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Old 07-06-2014, 14:39   #21
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Re: Smell Killer

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How about pumping out the holding tank once in a while rather than building an aeration system?

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Deposits are anaerobic in nature when added to the tank.

Adding oxygen allows the aerobic bacteria to quickly displace the anaerobic bacteria.

Unless you are going to pump out after every flush, will have at best a modest effect.
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Old 07-06-2014, 14:47   #22
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Re: Smell Killer

Sorry if my reply seemed flip or uninformed. I use fresh water to flush and pump out at least once a week. I do use a tank deodorant from WM and don't have an odor problem. As per Peggy Hall's advice, I suppose the fresh water makes the difference.

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Old 07-06-2014, 19:30   #23
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I use fresh water pump out weekly and spend too much on chemicals. I would like to change to a new larger vent hose but one end of hose is not very easily reached.
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