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PostPosted: September 15th, 2018, 7:27 pm 
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Location: Rattlesnake Pond ME
sk8r wrote:
littleredcanoe wrote:
The chemical treatment mentioned in a post above requires a four hour set time.....



That is an absolutely worst-case scenario. I have never used water so murky & "dirty" that I have needed anything like 4 hours. Nowhere near.


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I believe you but I also believe animal poop does not make a river dirty and murky.. The Current is crystal clear. It's also got a huge population of wild horses..
E coli is no ones friend. Its also probably the most prevalent source of "giardia"


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PostPosted: September 16th, 2018, 8:11 am 
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Ok, we all need to be situationally aware out there. But, that said, if you actually look at those instructions I posted... E Coli... 15 minutes.. Giardia, clear water, 30 minutes. I don't know where your bias comes from - doesn't matter - but I think it's important to use the facts with these things and not just a belief factor. :)

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PostPosted: September 17th, 2018, 8:37 am 
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Yury wrote:
Splake wrote:
In practice, filtering is fine for everything but viruses and viruses are not considered a risk factor in Canada.

Why is this not a risk?
Do not they have humans with hepatitis hiking/canoeing and pooping up there?


Fair question and most likely a big reason why the workplace safety training for the MNR requires both filtering and chemical treatment.

It's been a while since I researched water treatments in detail. At the time the contrast was between tropical, warm water, higher population density, potentially much lower sanitation and waste water treatment standards versus temperate, cool or cold water, lower population density and generally higher sanitation and was water treatment standards.

That said, you may have noted that my default water treatment is a chemical treatment with Pristine.

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PostPosted: September 17th, 2018, 2:59 pm 
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Location: North Bay, Ontario, Canada
our main concerns in Canada tend to be Giardia and Cryptosporidium:

so, therefore, from the chart above you are looking at 30 minutes minimum.

As the water gets colder the longer the wait time.

The dirtier the water the longer the wait time.


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PostPosted: September 20th, 2018, 12:35 pm 
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Location: Kitchener, Ontario, Canada
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recommend the MSR filter over platypus. The Bag is more durable.


Agreed. The MSR gravity filter is all I use now, in all waters. I have used the equivalent Platapus, and it is not as durable. Durability is the MSR hallmark.

Took me a while to trust these gravity filters (over a pump), but after 8 trips a year for many years, no one was gotten sick.

For Ontario lakes, no need to worry where you get the water from... if you are worried, use the canoe to fill the bag out from shore a bit, but I don't even bother with that any more.

I have also used the MSR pump, pills, and UV pen (for hiking trips, lighter). Pills are my least favorite... there are risks, if you use them incorrectly.

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PostPosted: September 25th, 2018, 9:44 am 
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Location: Converted Car Camper
I ended up going with the Platypus Gravity system. It was on sale at atmosphere for $99. I used it as well as Katadyn tabs and made it 4 days with no problems.

We sourced our water from the middle of the lakes and gave the tabs extra time to work. I found there was a small odour in the jug after treatment but couldn't really notice much of a taste.

Thanks to everyone for all their input, it was nice to free myself from the heavy water jug on the portages!


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PostPosted: September 25th, 2018, 1:54 pm 
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They made a carbon filter that fits on below the 'filter filter'. It takes out the occasional pine gamie flavour of the water and makes it neutral. Was $11 only downside is it slows the process, maybe doubles the time but I'm rarely in a hurry. While some have mentioned durability mines lasted 6-7 years now.


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PostPosted: September 25th, 2018, 2:22 pm 
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Location: St. Catharines, Ontario
I've been using a Sawyer Squeeze for about 4 years now without a problem.

On solo trips I just screw it onto a 1L the water bottle and drink directly from it.

If I'm paddling with a partner I screw it onto a 2L Evernew bag and we both fill our bottles with it.

If I'm out with a group of 3 or more I use it as a gravity filter. I actually started out with a platypus and was a little unhappy with the stock platypus filter. So I bought a couple adapters to use the sawyer as the inline filter instead of the stock one. I still usually end up bringing the 2L bag so we can fill our bottles quickly in the middle of the lake or river without having to wait around.

I found the weakest point on the Sawyer system to be the stock squeeze bags (not durable, failed after 5-6 trips), the weakest point of the Platypus was the filter (clogged to easily, didn't handle tea coloured water well).


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PostPosted: September 26th, 2018, 9:40 am 
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Backflowing some water to clean out the gunk is something the manufacturers don't like to mention too often or loudly as it cuts into filter sales but works wonders.


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PostPosted: September 26th, 2018, 10:37 am 
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Yes, I always back flush the Sawyer after a trip with a small amount of bleach and water to remove any gunk and sanitize it. Some trips it seems totally unnecessary, some trips it surprises me with the amount of stuff that comes out.

I have never over the course of a trip really noticed a slow down in the flow rate with the Sawyer. However with the Platypus on the other hand I did, and it left me a little less then confident with it.

You can treat after filtering if your worried about viruses or anything slipping past these higher flow rate filters. Normal household chlorinated bleach should do the same job, and I believe the ratio is 1 drop to 1 liter of clear water, then let sit for 30 minutes. Filtering before treating isn't entirely necessary, but it should boost the effectiveness of the bleach.


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PostPosted: September 26th, 2018, 1:05 pm 
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steve.of.london wrote:
Backflowing some water to clean out the gunk is something the manufacturers don't like to mention too often or loudly as it cuts into filter sales but works wonders.


The MSR gravity filter specifically notes to backflow the filter as part of regular maintenance.


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PostPosted: September 26th, 2018, 2:40 pm 
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I noticed the Platypus slowed down a bit by the 4th use but even then we're talking 10 minutes to filter 4L of water. We planned ahead and were never in a situation where we were thirsty and waiting around for it to finish.

I'm going to backflush it after every trip but 10 - 15 mins doesn't bother me. So far very happy but I think i'll pick up a dromedary or a more durable container for the clean water.


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PostPosted: September 26th, 2018, 4:10 pm 
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msr backflow....How much do they recommend out of curiosity?


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PostPosted: September 27th, 2018, 8:13 am 
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They say to back flow 1/2 L every 8L.

https://d1l67pfsx3wblg.cloudfront.net/p ... ual_en.pdf

I dont back flow that often. We generally just back flow it with clean water at home after a trip and disinfect.


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PostPosted: September 27th, 2018, 10:27 am 
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Location: St. Catharines, Ontario
Is there any difference between the Platypus and MSR gravity filters? the bags are different, but other then labeling they look almost identical.


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