White particles in watercooling loop

AdamPflug

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Jun 14, 2013
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Hi everyone, this first time visiting tom's hardware but from some of the other posts on the site everyone seems pretty friendly :)

I have a watercooling loop that has been running fine for about 8 months, but over the last month or so I've started to notice the water in my reservoir looking a little cloudy, and it was also a little getting a bit low. I opened it up today and added about a half cup more distilled water to it to top it off. When I started the loop up again I noticed some white particles floating around in the water in the reservoir for a little bit. They're gone now (I suspect recaptured by the mesh filter in front of the pump) but now that I've added more water I can tell that what I thought was cloudy water was actually a slight film on the surfaces of the reservoir (it doesn't extend all the way up to the new water level).

I looked around on the forum and found this post:
http://www.tomshardware.com/forum/276368-29-algae
which seemed to be a similar problem, which people concluded was corrosion? That doesn't seem like it should be a problem for me though because I'm pretty sure all my components are brass, copper, or plastic (I'm new to all this though, so I could be wrong).

Here is everything (I think) in my loop:

Also, this loop is cooling (although it is probably not relevant):

  • ■ 1x Intel Core i7 860
    ■ 2x Gigabyte Nvidia GTX 560

Does anyone have any suggestions for what the problem could be? Thanks a lot for your help in advance!

- Adam
 
Solution
Ahh, I think I know your issue.

That tubing you use (I also do) has a tendency to excrete a white substance, that I think is plasticizer which is what gives them some flex, after a while of being in the loop.
If its not too much effort, drain the loop and examine the inside of your tubing. For me, there is a white buildup that you can scrape off.

Its harmless as far as I know.
Ahh, I think I know your issue.

That tubing you use (I also do) has a tendency to excrete a white substance, that I think is plasticizer which is what gives them some flex, after a while of being in the loop.
If its not too much effort, drain the loop and examine the inside of your tubing. For me, there is a white buildup that you can scrape off.

Its harmless as far as I know.
 
Solution

endeavour37a

Honorable


Yep, that is it. I knew it was something to do with the tube but could not remember what they called it. As you say it's normal and relatively harmless.
 

AdamPflug

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Jun 14, 2013
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Thanks a lot, that sounds like the issue. With some googling I found this post:
http://www.overclockers.com/forums/showthread.php?t=689981
and the pictures look very similar to what I'm seeing.

It sounded like it may also be caused by heat. That would make sense because it happened at the same time that my loop temperatures were going up because we're getting into the summer months and also because my radiator started to get dusty.

Can you think of any way to clean the plasticiser out shot of taking the loop completely apart and scraping it out of the inside of the tubes and blocks (not sure how I would clean out the inside of the radiator). Or do I even need to worry about cleaning everything out? Think it will effect my cooling performance?
 

Buzz247

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Mar 18, 2013
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Plasticizing residue can clog blocks pretty easily over time. Just your pump filter catching it can significantly reduce flow too. Time to roll up the sleeves son ;)

Upside - only have to do this once in a great while. But you are due. Not likely to build as fast next time. The white build up is from the tubing as Manochalk said, and more common in colored tubing. If you have a clear slime buildup... well, your biocide isn't doing it's job and you need a deep clean yesterday
 

AdamPflug

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Jun 14, 2013
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10,510


Aww man, so much for the lazy way out :)

Do you guys have any suggestions for cleaning out the tubes? Some of them are fairly long and I don't think I could get a toothbrush or anything all the way down them.