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Old 07-10-2015, 06:04 PM   #1
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Black tank prep

Hello
We are fairly new to the black and gray tank world. This is our second season with our Flagstaff Microlite 25DS.
I think my hubby and I have a system going with the dumping at the end of our trip. However, I have been researching more on this procedure.
I have some questions.
We basically camp 5-6 times a season being from summer to early fall.
We camp mostly state parks with no water or sewage hook up so it is to the dump station we go at the end to empty (and also before to fill up the fresh water tank).
We mostly camp 2-3 day weekends with an occasional 4-5 day jaunt.
When we dump at the end of our weekend, we may not go again for 2-3 weeks.
We pour the black tank additive after we are set up into the toilet/tank along with some water to cover the bottom of the tank.
When we empty the black tank at the end, it can show 2/3 full or so. My question is, are we to leave some small amount of water AND additive in the tank after our trip or is this not necessary? I see from some research I have been doing, that water should be left in the tank along with additive? If so, how much? What about the gray tank? We try to empty until the sensors are showing empty ( I know this can be unreliable) Thanks much for your input.
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Old 07-10-2015, 06:47 PM   #2
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YES, definitely add some water.
A black tank should NEVER be left dry for very long.
After dumping, I add 3-5 gallons of water from a bucket and then the additive.
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Old 07-10-2015, 07:35 PM   #3
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And use the GEO method while you're in camp:

Forest River Forums - Downloads - Geo Method
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Old 07-10-2015, 08:16 PM   #4
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GOOD stuff Rockfordroo! Thanks!
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Old 07-10-2015, 09:26 PM   #5
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thanks for the info.
So, after I dump the black tank and gray tank, then I should add an additional 3-5 gallons with the 4 oz of liquid chemical?

So when I return to camping in say 2-3 weeks, I am good to go without adding anything else?

also, it is ok to leave the gray tank empty then?
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Old 07-10-2015, 09:57 PM   #6
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PT - the black tank is the one that needs special "care" as detailed above. So yes, put 3-5 gallons of water and what ever chemical or GEO method additives you choose. The gray tank only handles soapy water so it will be fine if left empty. Some people put a little water in the gray tank too on the theory that it prevents odors. I leave mine empty.
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Old 07-10-2015, 11:17 PM   #7
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Quote:
Originally Posted by PTLady View Post
thanks for the info.
So, after I dump the black tank and gray tank, then I should add an additional 3-5 gallons with the 4 oz of liquid chemical?

So when I return to camping in say 2-3 weeks, I am good to go without adding anything else?

also, it is ok to leave the gray tank empty then?
PT Lady,also treat the Gray tank same as Black! Your kitchen sink as well as your body oils will Stink up the Gray tank just like the Black! Youroo!!
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Old 07-10-2015, 11:54 PM   #8
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I do the water & chemicals when leaving the CG and do the GEO when I arrive.
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Old 07-11-2015, 08:00 AM   #9
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Ice cubes

After we dump our black tank, Just before we get ready to pull out and hit the road, we flush all our ice cubes down the toilet, These will slosh around and clean the sides and bottom of the tank, and then they melt and go away.

we don't use any additives
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Old 07-11-2015, 08:21 AM   #10
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I use the GEO method in both grey and black before I hit the road so that the softener/detergent sloshes around the tanks. When I leave the campground I dump, and then put a gallon of water and deodorizer powder in the black so that it sits in the tank while parked.
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