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Old 12-11-2017, 09:54 AM   #1
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Black Tank Question

Hi everyone;

We are new Jayco Greyhawk Prestige owners and are preparing our coach for traveling items and was wondering if anyone had any suggestions about the additives for the black tank to help solids digestion. Do you have to use the RV toilet paper as sales people proclaim or can you use any biodegradable toilet paper. What about using some water additive like in port-o-potties that help in decomposition of the solids.

Thanks
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Old 12-11-2017, 10:06 AM   #2
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We use regular TP after doing the shake test on our preferred brand.

I prefer happy camper but after using their cleaner we use nothing except rinse water with dawn dumped into the toilet after the dishes. We only dump when full and have no odors. You need to cover with liquid to keep odors down, that is where the rinse water helps. We rinse when dumping to get the solids out.

And...there are 8373738 threads about this, you might want to search.
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Old 12-11-2017, 10:07 AM   #3
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Hey ltc,
Digestion isn't really necessary, they are just holding tanks afterall. Keeping the sides of the tank and the gate valve slippery is a more important issue. Keeping the tank slippery helps to keep your monitors working better, and probably also helps to encourage more solids to go out of the tank when dumping. Maybe less odor then too. In our experience it is the hard water that makes stuff stick. We do two things to combat that. One we use an On The Go ion exchange water softener on all the water that comes into our rig; second, we add one cup of Calgon to the black tank after each dump. We dissolve the Calgon in the dish pan with a couple of cups of warm water, then pour it down the toilet after finished dumping the tank. The Calgon has quite a perfume so it also helps to mask any unpleasant odors. Our $0.02
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Old 12-11-2017, 10:12 AM   #4
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Water, just use plenty of water when you do your business. Water, did I say just add water? All you need. There is nothing magic, or biological, or chemical or nuclear physics happening inside your holding tanks, they are just tanks, plain and simple. TP, use what you like, just add water. Nothing wrong with adding this or that, but nothing takes the place of sufficient water. If you have a black tank flush, use it every time you dump your tank. Flush it out, use lotsa water, keep it clean. Now, go outside and enjoy!
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Old 12-11-2017, 12:34 PM   #5
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We have been RV'ing for the past 7 years now and have never had any issues with either Black or Grey Tanks.
I have a regular routine that has kept everything working and smelling fine:

1) Try to wait for the tanks to be min. 3/4 full before dumping.

2) Dump the Black Tank first, Grey Tank last.

3) We add 1-2 oz. packet of "Thedford Auqa Chem -Dri" (Walmart $8.00 for 8 packs) directly into the toilet to break down solids and minimize odours, and then 1 cup of Borax Detergent and 1 cap full of Calgon Water Softener to loosen up any solids sticking to the side walls. Tank monitors are always accurate.
Our Black Tank has an external connection to flush the tank.

4) After dumping the Grey water, I add 1/2 - 1 cup of "Blue Dawn Dish Liquid" directly into the sink drain. This keeps grease off the interior walls of the tank and when you dump, you will see lots of soap bubbles in the clear hose adaptor and smell a fresh smell from the soapy water. Tank monitors are always accurate.

5) We always use regular toilet paper and have never found that we need RV specific toilet paper.

There are actually a few good You Tube Videos showing tests done on a comparisons of RV and regular toilet papers breaking down in the Black Tanks.
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Old 12-11-2017, 01:11 PM   #6
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I would like to add one caveat to the "empty Black Tank first" senario.

Start with the gray tank for a couple of seconds.... then

Close the gray and open the black until it is empty.... then

Close the black and go back and open the gray until empty.

You can thank me now or you can thank me later but you will remember when it is your turn for a mishap. BTDT
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Old 12-11-2017, 01:34 PM   #7
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Quote:
Originally Posted by cruzbill View Post
Water, just use plenty of water when you do your business. Water, did I say just add water? All you need. There is nothing magic, or biological, or chemical or nuclear physics happening inside your holding tanks, they are just tanks, plain and simple. TP, use what you like, just add water. Nothing wrong with adding this or that, but nothing takes the place of sufficient water. If you have a black tank flush, use it every time you dump your tank. Flush it out, use lotsa water, keep it clean. Now, go outside and enjoy!

THIS^^^^^^

Water is KEY
Dump the waste tanks when full (at least 3/4)\
The WHOOSH effect
Water is heavy and the weight/volume will carry the stuff out of tank.

Grey can be as nasty or worst then black due to food particles, cooking grease/oil, sloughed skin/body oils/urine & hair


Just remember
A high level fast flowing river can move boulders
A low level slow flowing creek can NOT even budge a pebble

Fill them UP and then drain..........'River'


One should not have any sustained odors inside RV from waste tanks.
Little whiff when flushing is to be expected due to 'direct' drop to black tank---RV Gravity toilets do not have built in 'P' traps like residential toilets
But water in bowl, water in 'p' traps, working Air Admittance Valves and tank Vents are used to stop odors from coming back inside RV.

Chemicals/no chemicals is a personal preference.
I can't stand the smell of 'chemical poop' so WE do not use any ---just water

Never have had an issue in 40 yrs of RVng
Dump when Full---Flush on occasion (don't think it is necessary everytime you dump)---ADD a few gallons of water back into grey & black waste 'holding' tanks after dumping so nothing dries out and sticks.
Maintain/fix vapor barriers and venting so 'no odors'
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Old 12-11-2017, 03:31 PM   #8
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Water is the key...use plenty when you are in a place where you can dump easily.
Before traveling add 1/4 - 1/2 tank of water...a little of your favorite soap detergent and then dump when you arrive.
If you have a black tank flush use it often.
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Old 12-12-2017, 08:48 AM   #9
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If you google "geo method rv black tank" you'll find numerous articles about using Calgon water softener and Dawn dishwashing detergent to keep the tanks clean and level indicators accurate.
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Old 12-12-2017, 12:04 PM   #10
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Thanks so much, you guys are the best.
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Old 12-13-2017, 11:30 AM   #11
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We've always used Charmin Ultra soft (it won for best dissolving in the RV tank - ), and have always used a cap full of Calgon Water Softener to the black tank. It makes the water very slippery, and keeps "stuff" from sticking to the tank sensors.
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