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Old 10-26-2014, 12:06 PM   #1
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Bugs in Black Water Tank

I have the AS at home and I can dump the black water into a 5 gallon bucket then close the valve and haul it to the nearby power room toilet in my house. I've used the black water flush to clean out the tank and as the water cleared I noticed what seems to be insect larvae in the water. Anyone notice this? Would using tank deodorant prevent the bugs?

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Old 10-26-2014, 12:13 PM   #2
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Ick!

Have never noticed that, but I would sure do whatever is needed to get rid of them. And, not sit on that toilet til I was sure they were gone.

Sounds like your tank is not being emptied completely, perhaps?? Maybe find a dump with a long hose, put it down the toilet and give it a good cleaning.

You can also buy an attachment for a garden hose that creates pressure and do the same thing.


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Old 10-26-2014, 12:17 PM   #3
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Fly larvae?????? What Maggie said...they need poop to lay eggs. Flush it good. I have never seen that either. Something must not have gottten cleaned out last time
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Old 10-26-2014, 12:56 PM   #4
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I am very curious about how long the black tank was left without being emptied.

Keep in mind that insects can, and probably occasionally do, access both the black and gray tanks, through the roof vents. A good ripe black tank would probably lure a lot of flies. I wouldn't be concerned, unless bugs start flying out of the toilet when you flush it.

I would just empty it, flush it, and in the future don't look to see what comes out of it when you drain it.

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Old 10-26-2014, 12:58 PM   #5
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I seen that sometimes, especially when going down south where it is warm and humid.
Flies and gnats can get down through the plumbing vents into the tanks.
Dumping every 4-5 days and taking time to rinse and flush really good after dumping the waste tanks solves this problem.
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Old 10-26-2014, 02:32 PM   #6
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No bugs found in the toilet bowl or the trailer. Usually when I'm at a campsite with water before I go to the dump station I fill the black tank almost full with the black water flush. They are small, 1/4" long x 1 1/16" wide. Maybe they are mosquito larvae. Maybe I'll put some chloride don't the tank before I go out next weekend.

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Old 10-26-2014, 03:26 PM   #7
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This is what water mosquito larvae look like if you scuba dive in your holding tank.

Controlling Mosquitoes at the Larval Stage | Mosquito Control | US EPA

I'm guessing yours were some sort of fly larvae(maggot).

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Old 10-26-2014, 03:32 PM   #8
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How can mosquito/ fly larvae survive the chemicals we add?


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Old 10-26-2014, 03:58 PM   #9
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How can mosquito/ fly larvae survive the chemicals we add?


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I'm sure it depends which of the many various products are used. Some are simply deodorants. Some are biologic enzymes that break down the waste. Some people probably don't use any.

Maybe they use floating objects as rafts.

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Old 10-27-2014, 06:09 AM   #10
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Living in an area where mosquitoes grow the size of Cessnas, this is a subject near and dear to my heart… The accepted method of killing mosquito larvae (and by extension any insect larvae) in standing water is:
1 - Add mineral oil to the water. Mineral oil floats, and forms a barrier that prevents the water from being oxygenated.
2 - Squirt in dish soap. This poisons the water and kills the little buggers that survived the mineral oil. If you wash dishes in a washbasin and dump the basin in the toilet, that works too, in addition to stretching your gray tank capacity.

Sidebar— The fact that dish soap kills insect larvae is one reason why you only see the larvae in the black tank, not the gray tank.
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Old 10-27-2014, 06:56 AM   #11
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That's good info, Protag.

There are at least a few pans of dishwater in every tank we dump, always. May have been accidentally preventing insects all along.

This also makes a good case for dumping frequently.....not usually a problem when you have small tanks like ours.

If I were to find insect larvae moving around in my toilet, I would be one freaked out woman.


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Old 10-27-2014, 11:13 AM   #12
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Protag - That is a wonderful idea about the dishwater. I had no idea the dish soap would kill those insects in the black water tank. (though we have always used plain Dawn on the many rescue dogs and puppies we fostered to kill fleas) Now that we are finally getting on the road, this is a great tip!
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Old 10-27-2014, 11:44 AM   #13
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I don't find the bugs in my grey water so the dishwater must do the trick. They are not mosquito larvae looking at a previous post link so must be something else. They almost look like seeds but there seems to be a small head at one end. Several flushes of the tank in preparation for monitor recalibration and I still saw some in the bucket. I'll add some dish soap to the tank before heading out this weekend.

Thanks

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Old 10-27-2014, 12:01 PM   #14
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I'm sure a bit of chlorox in the black tank would effectively terminate any residuals that may have survived your prior efforts. It would also end any biologic action going on and then that would need to be regenerated on it's own time. I guess that I have unknowingly prevented such growth by the occasional dishwater deposited in my effort to save some grey tank space. Amazing some of the good things that happen out of ignorance.
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