dirtywater will turn pure water to dirtywater??

[Smartbird]

i made a big pool under my base, but later i found that the pure water kept turning to dirty water.

629 cycle:

 

and 730 cycle is like this:

is this something normal but i don't know yet, or some bug??

this is 636cycle .sav

3.rar

[ATOM7K]

Were you pumping out the clean water, if not perhaps some polluted ice melted from an above Ice Biome??

[PickPay]

Is there Slime laying around ? Or even Slime tiles water is in contact with.

[Risu]

The only thing that can convert water to dirty water passively is corpses.

Even checked what I originally expected to have such an interaction and all I found was a supposed interaction between contaminated oxygen and chlorine to produce oxygen, which I tested in game and that doesn't appear to be active.

It's possible I overlooked another interaction but I sure haven't found anything.
 

[Lafara]

last month ... in mini Water Tank 2x10 tiles, some Dupes vomit into Water tank while he fetch pure water.

3 times out of all, I found out that those small puke polluted most of pure water into pure puke.  

 

I think polluted water contaminating pure water is possible. But it has unknown condition and slow rate of change.

well. I didn't observe that mini Tank every cycle.

[Smartbird]

1 hour ago, ATOM7K said:

Were you pumping out the clean water, if not perhaps some polluted ice melted from an above Ice Biome??

i didn't touch the pool.

and the polluted ice will not make pure water disappear.

[MoMuffins]

Are you sure your polluted water wasn't compressed?  Polluted water has lower compression than water, 800kg:1000kg.  So for the same mass, dirty water takes up 25% more tiles upon relaxation.  So if the dirty water was initially compressed, then what you saw was simply a relaxation of the mass over time.  Compression could have happened when the liquid fell down.  It could have been generated that way.  Like @Risu said, I've only seen dupe bodies turn water into polluted water.  I've utilized the immiscible property of liquids without ever observing this.

[Keylan]

10 minutes ago, Smartbird said:

i didn't touch the pool.

and the polluted ice will not make pure water disappear.

Not disapear, but it will push it away, and water level is a lot higher on the second screenshot.

My bet is on poluted ice as it expands like crasy if you digged it out before and got tons of it lieing on the floor.

 

[Smartbird]

2 hours ago, Keylan said:

Not disapear, but it will push it away, and water level is a lot higher on the second screenshot.

My bet is on poluted ice as it expands like crasy if you digged it out before and got tons of it lieing on the floor.

 

 it is not pushed away, the water level get higher, because the dirty water has 800 density, after the pure water turned to dirty water, it will take 25% more place.

[Smartbird]

4 hours ago, Fatmice said:

Are you sure your polluted water wasn't compressed?  Polluted water has lower compression than water, 800kg:1000kg.  So for the same mass, dirty water takes up 25% more tiles upon relaxation.  So if the dirty water was initially compressed, then what you saw was simply a relaxation of the mass over time.  Compression could have happened when the liquid fell down.  It could have been generated that way.  Like @Risu said, I've only seen dupe bodies turn water into polluted water.  I've utilized the immiscible property of liquids without ever observing this.

i digged the pool very long time ago. there is no compressed dirtywater, and there is not any dirtyice under the water.

[Smartbird]

i have tried something, build a wall on the top of the pool, nothing else changed. and nothing will happen, the pure water will stay there.

so, there is no compressed dirty water down there. and as you can see, there is not much dirtywater falled down from above.

i guess the dirty water from above falled down to the pull, and this somehow triggered a bug, much water transfered to dirty water.

 

add a wall, and run till 717 cycle:

 

without wall at 729 cycle:

[MoMuffins]

Any of your polluted water submerged a geyser vent?  I've been told that doing so will cause geyser vent to spew forth only polluted water.

[Keyimin]

To me, the pics of the water with the "floor" above it and without prove the point that it's a water density/displacement issue. Have you hovered over each tile of polluted water in each scenario to see the water per tile by comparison and if they're all actually polluted water only? My guess is that what appears to be a lot more polluted vs. clean isn't, but rather an odd mixing/displacement. I've seen dupes pick up clean water out of what visibly looks like only polluted water. But lo and behold, there was in fact clean water mixed in there.

[heckubis]

14 hours ago, Fatmice said:

Any of your polluted water submerged a geyser vent?  I've been told that doing so will cause geyser vent to spew forth only polluted water.

looking at the screens both the geysers are not corrupted. at least they look clean. but I defiantly feel his pain

[Kasuha]

I'm pretty sure I have seen polluted oxygen turning clean water into contaminated. 

[MoMuffins]

Nope, that does not happen.  Polluted water can produce polluted oxygen but it needs some oxygen as a catalyst, very very little is needed.  This process is also slow and the polluted water looses mass in the process at a 1:1 ratio (1g of polluted water to 1g of polluted oxygen).  The greater the surface area the better.  Regarding OP, I have found the reason.  Indeed, polluted water can transform water into more polluted water.  It requires very a special condition.

[Keyimin]

12 hours ago, Fatmice said:

Nope, that does not happen.  Polluted water can produce polluted oxygen but it needs some oxygen as a catalyst, very very little is needed.  This process is also slow and the polluted water looses mass in the process at a 1:1 ratio (1g of polluted water to 1g of polluted oxygen).  The greater the surface area the better.  Regarding OP, I have found the reason.  Indeed, polluted water can transform water into more polluted water.  It requires very a special condition.

Care to share that special condition with the class? ;D

[heckubis]

15 minutes ago, Keyimin said:

Care to share that special condition with the class? ;D

easier with a geyser than normal water. with a geyser just flood it out with contaminated water the mass of the contaminated water will surround completely the clean water and slowly convert it in the geyser example its converted almost instantly steam included(temperature is at about 40c after flooding) regular water must be confronted on at least 3 of the 4 sides it has by contaminated water for the contamination to over power it

[Risu]

55 minutes ago, Keyimin said:

Care to share that special condition with the class? ;D

Did a quick test.

2000g of Oxygen in 4 tiles. 500g per tile.
3216kg of Polluted Water in 4 tiles. 800kg + 800kg + 808kg + 808kg. 800kg tiles on top.

Result: 1999.8g Oxygen, 3215.2kg Polluted Water, 800g Contaminated Oxygen.

Edit: After further testing it accepts Contaminated Oxygen as a catalyst as well. Must not be consuming it in the process?

Nope. Just saw it go from 800g to 1599.8g leaving 3 tiles of Oxygen still at 666.6g.

Final word on it: 0.1% of a polluted water tile sublimes into contaminated oxygen in the presence of breathable gas. The game tries to consume 100g of gas, but I suspect this is due to tile displacement destroying it instead. Just used 20000kg Oxygen as catalyst, distributed in 2 tiles and 50kg of water in 1 tile. End result was 49.95kg polluted water, 50g contaminated oxygen, and 20000kg oxygen.
 

[MoMuffins]

I did my test with 10kg of painted polluted water.  I painted this as a 1x10 line in a 3x10 enclosure.  Then I painted 1kg of oxygen gas into the enclosure.  I left the game running and waited for things to happen.  When I come back, I counted up all of the oxygen and polluted oxygen gas.  The answer was minimal loss of oxygen, an approximately equal creation of polluted oxygen to loss in polluted water.  That is why I figured it was 1:1.  Now in the game, it would be best to have a thin film of polluted water in an enclosure with some oxygen as catalyst.  This will maximize the chance of conversion and thus the rate of polluted oxygen production.  This is good if you don't want to use morbs.