[SOLVED] Weird Growth in Loop

[turok_tt]

Hey everyone,

I had my loop for around 6 weeks now and all my parts are new including: CPU block, GPU block, pump, reservoir, radiators x2 and hard tubing. They are all brand new and never used. Given that my CPU and GPU block have acrylic tops, I can see that they were absolutely clean without any debris at all when I purchased them. I rinsed them with distilled water for 30 minutes or so before installing them. For the radiators, I have cleaned and rinsed them as well for several hours to remove any debris from the factory. I did this religiously to ensure that both radiators were completely cleaned before I installed them.

Currently, I am using Dazmode protector (https://www.dazmode.com/shop/watercooling/liquids/performance-liquid/dazmode-protector/) which is an anti-corrosion and biocide coolant. People claim this is the same stuffs as Feser One from Germany. It recommends mixing 100mL of this coolant with up to 900mL of distilled water. I mixed 100mL of this coolant with 700mL of distill water in my loop.

Anyhow, my watercooling loop has been running for 6 weeks (my computer is usually turned off at night time) and I find this weird growth in my loop. As you can see from the pictures and videos below, there are blotches of white spots which look like mold/lint and appear fluffy too. You can see these spots along the hard tubing, CPU waterblock and reservoir. Also, you can see a thin layer of this fluffy stuff on the surface of the water in the reservoir.

Any idea what this is? Is this algae growth?

Here are the pics and videos:
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[url=https://postimg.cc/LnVDQxQs]

View: https://youtu.be/qzdjHjV-vpU

 

[Eximo]

Hmm, plasticizer or o-ring lube maybe.

Your extra concentration of the biocide might not be great and caused something to precipitate out. I recall seeing similar in my loop early on and after a drain and fill, tends to go away. Always a little bit of stuff floating around in there, pretty hard to get a perfectly clear loop. (Though I only have the one spot I can see the flow, and not clear tubing, so I don't mind as long as temps are good)

 

[turok_tt]

Hmm, plasticizer or o-ring lube maybe.

Your extra concentration of the biocide might not be great and caused something to precipitate out. I recall seeing similar in my loop early on and after a drain and fill, tends to go away. Always a little bit of stuff floating around in there, pretty hard to get a perfectly clear loop. (Though I only have the one spot I can see the flow, and not clear tubing, so I don't mind as long as temps are good)

Yeah so far my temps are still good, but i dont want this to get worst. The good thing is, this stuff dislodges easily from the tubing. Are you saying that after you drained your loop because of the precipitate, you reused your coolant and the precipitate didn't come back? Or you just replaced drained your loop and put new coolant?

 

[Eximo]

I just use distilled water, so doesn't take much to drain and swap everything (though my loop is pretty hard to fill). I use a primochill biocide, but only a few drops and have a kills coil in the reservoir (I think technically this is counter indicated with nickel coatings, but it hasn't been a problem for me, my blocks and radiators are plain copper)

Recently re-built around this i9-10900F, not much floaty bits left in there. Some scale from the nickel parts came out, but that is to be expected given the age of some of my parts.

I do recall the white floaty stuff like you are seeing on my first build, I really do suspect the o-rings. I use soft tubing, so I wouldn't expect your acrylic/PETG to also put out the same stuff.