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Groover tank quantity

1977 Views 27 Replies 20 Participants Last post by  wils_25
How many eco safe tanks for 12 people on a 7 day trip?
Any input will be appreciated.
Thanks
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3 days per tank should be easy. 4 if you tromp the la la. 馃挬
Thank you Big Wave.
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Two would work if you add a little water 3/4 of the way through the tank to consolidate the paper products 鈥
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The book answer is two tanks. Each tank holds 50 person days of poop, 12 people times 7 days is 84. Two tanks will be fine. The first day is not really a full use day in most cases. If you get tight on room you can shake the tank down as quiggle suggested. There is also a recent thread about bagging the TP and keeping it out of the tank, which will give you more room. I am not recommending that but it is a fall back for the last day or two if the second tank is filling up.
I tried to research person days for the groover and i couldn鈥檛 find anything. Your information will be helpful in the future.
Thank you KrisG
The book answer is two tanks. Each tank holds 50 person days of poop, 12 people times 7 days is 84. Two tanks will be fine. The first day is not really a full use day in most cases. If you get tight on room you can shake the tank down as quiggle suggested. There is also a recent thread about bagging the TP and keeping it out of the tank, which will give you more room. I am not recommending that but it is a fall back for the last day or two if the second tank is filling up.
Bring 3. Better to be Eco Safe than sorry.馃挬
You can also save meals that are likely to fill more space in the groover until the last day.
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What meals take less space in the groover than others? Never really measured or thunk'd about it.
I'd take two and some wag bags just in case.
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What meals take less space in the groover than others? Never really measured or thunk'd about it.
I'd take two and some wag bags just in case.
Not sure it helps with space but notice more groover use after tacos, lasagnas, and stroganoff : - )
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7 ppl/4 nights we just made 28 deposits. There was room for another day and perhaps a few more. I won鈥檛 rate the eco safe for more than 40 uses before things get sketchy. You just might make it with two for the 84 uses you have but it will require a little management to make it work well.
What meals take less space in the groover than others? Never really measured or thunk'd about it.
I'd take two and some wag bags just in case.
Fewer beans and things with fiber. Healthy dining usually but it adds to the groover fill rate. So, I wait until later in the trip.
poop * person * day.

Ecosafe = 45 uses * Day.

=1.87 ~2

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Did a 12 person 7 day on the Salmon a couple years ago with 2 Ecosafes. Filled em to the brim on the last morning and the last couple folks had to use wag bags. Take a third tank if you have one...
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EcoSafe claims to be 50 user-days, if I remember correctly. I've heard a rocket box is ~70 user-days. Happy to hear about other capacities, if not only for reference. I have 3 Eco-tanks, so if it were me I'd bring one for every two nights on the river. If you're just going out for a week, you can have the luxury of not filling groovers to the brim, especially with 12 people.
5.5 gallons, 50 uses

I wouldassume 1.5 uses per day per person.

1.5 uses x 12 people x 7 days = 126 uses required

Take the 3rd, worst case scenario you have an ammo can that stays in the boat the whole trip.
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Wow I didn鈥檛 realize that boating was Rocket Box Science. 馃槀
When I worked for the Park Service, my boss Mark Law wanted to verify the capacity of various groover systems. Some company had a stainless steel liner like the Eco Safe but no wasted space on top. I was on 10 day Snout trip with 5 total. I got all our 馃挬 in that box after tromping the la la but the archeologists we鈥檙e not happy.
50 user days in a rocket box is possible but freaks some people out.
poop * person * day.

Ecosafe = 45 uses * Day.

=1.87 ~2

Wow I didn鈥檛 realize that boating was Rocket Box Science. 馃槀
Well, it's useful that someone does the calcs so you're not hauling extraneous groover weight...or overflowing the groover.

poop * person * day.

Ecosafe = 45 uses * Day.

=1.87 ~2

I agree with these numbers.

We did a 7-person 9-day preseason MFS several years back. Somehow we did it all with a single Ecosafe. I know we stopped at Indian Creek and pooped in their composting toilet so that's more like 7 x 7 nights. It just fit.



It also depends on the composition of your crew. If you have a lot of big guys who tend to eat seconds, you'll have a lot fewer total uses in your groover system. If you have smaller women (especially if they're not rowing and burning calories) or a bunch of kids, you'll get more user-days. Though kids tend to use more TP.

Forehead Nose Eyebrow Jaw Gesture



EcoSafe claims to be 50 user-days, if I remember correctly. I've heard a rocket box is ~70 user-days. Happy to hear about other capacities, if not only for reference. I have 3 Eco-tanks, so if it were me I'd bring one for every two nights on the river. If you're just going out for a week, you can have the luxury of not filling groovers to the brim, especially with 12 people.
See tBatt's link above.
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Just to add one (VERY IMPORTANT) fine point to the discussion. If you plan on filling to capacity. buy or build an extended ring that elevates the seat up about 4". Makes a big difference in how full people are willing to use it
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Bringing a pee bucket make a big difference so liquid deposits don鈥檛 fill up your groover space. Some people just don鈥檛 like to wizz directly into the river.
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