Cold water contains more space between molecules thus leaving more space for oxygen. So yes, cold water holds higher amounts of O2, generally, than warm water.
393 post and I'm still asking noob ?'s
If I'm not mistaken:
Cold water=higher o2 level
Warm water=low o2 level
If this is backwards do not read any further
You know I'm not gonna write any more I think this is backwards.
If not I have a theory......well see
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Cold water=higher o2 level
Warm water=low o2 level
If this is backwards do not read any further
You know I'm not gonna write any more I think this is backwards.
If not I have a theory......well see
Sent from my iPhone using Tapatalk
1 - 19 of 19 Posts
And low oxegen can be aid bga
I'm deciding this is why I got such horrible bga this summer.
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I'm deciding this is why I got such horrible bga this summer.
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If something is heated , doesn't it's volume increase while it mass remain the same. If so it would make sense more space exists in warmer water i.e. warmer water is less dense than colder water. I'm thinking that this is illustrated in more extreme temps, i.e. ice and water vapor and also why salt and sugar dIsolve more quIckly and easIly In hot water than cold. Could it be the increase in molecular activity releases oxygen faster ?
And I was thinking this would be a yes or no sort of thing.....only on tpt
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yesAnd I was thinking this would be a yes or no sort of thing
This is a much more accurate explanation.If something is heated , doesn't it's volume increase while it mass remain the same. If so it would make sense more space exists in warmer water i.e. warmer water is less dense than colder water. I'm thinking that this is illustrated in more extreme temps, i.e. ice and water vapor and also why salt and sugar dIsolve more quIckly and easIly In hot water than cold. Could it be the increase in molecular activity releases oxygen faster ?
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yes, the warmer temp, the more molecules bounce around. It's a matter of probability at this point. The more active the molecules, the more chances are the molecules will bounce out of matter like water; that is gases escaping water. Note that all gases not just O2. This includes the essential CO2 as well.
Not true for water. It expands when heating or cooling. It's called water anomaly. (http://www.lsbu.ac.uk/water/anmlies.html)If something is heated , doesn't it's volume increase while it mass remain the same. If so it would make sense more space exists in warmer water i.e. warmer water is less dense than colder water.
Thus ice floats.
Pretty much Everything else expands with heat and contracts with cold.
Way to throw a wrench in the gears lolNot true for water. It expands when heating or cooling. It's called water anomaly. (http://www.lsbu.ac.uk/water/anmlies.html)
Thus ice floats.
Pretty much Everything else expands with heat and contracts with cold.
So I because it expand will it have more less o2
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The o2 concentration is still determined by the above, warm water off gases easier and more readily than cool water. Its not a space issue
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Sorry, that was not related to the original post. Just a clarification for water physical behavior.Way to throw a wrench in the gears lol
So I because it expand will it have more less o2
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OP:
Higher temp = less dissolved oxygen by volume of water, this is why all those fish deaths this summer, specially big fish that are more sensitive.
.... as stated before, more temp = more collisions, but holding dissolved gasses is also affected by atmospheric pressure. Not always true to salts and such... If I remember well.
However, look up "chatelier's principle".
Oh, here is a helpful link: http://antoine.frostburg.edu/chem/senese/101/solutions/faq/temperature-gas-solubility.shtml
Another thing to think of as the caise of bga is the plants. Warmer water will cause the metabolic rates of plants, to go up. With faster growth, more of a demand for nutrients. Low nitrates is listed as a cause for bga so you might of actually bottomed out on nitrates.
I thought that if the water was warmer, it would allow more oxygen to saturate inside of it.
Well, you're dead wrong! Lol!I thought that if the water was warmer, it would allow more oxygen to saturate inside of it.
Lol, people -- it's yes or no, as the OP rightfully stated; pejerry and I are undoubtedly correct that in an aquarium environment, cold/cool water contains more dissolved oxygen than warm water.
Unfortunately , I can't open the links on my phone but I do believe that maximum density for fresh water is around a temperature of 38f or 39f. Above that colder water Is denser than warmer. Although, I hadn't taken into account the possibility OP was keeping his tank frozen. Lol. Mea culpa. Kudos to you pejerrey.Not true for water. It expands when heating or cooling. It's called water anomaly. (http://www.lsbu.ac.uk/water/anmlies.html)
Thus ice floats.
Pretty much Everything else expands with heat and contracts with cold.
OP: sorry for the misleading comment, please disregard.
Correction from a chemistry nerd
Cooling water does not significantly change its density, and oxygen content is not a function of the density, anyway. The real reason is that at warmer temperatures oxygen has more energy and escapes as a gas more easily.Cold water contains more space between molecules thus leaving more space for oxygen. So yes, cold water holds higher amounts of O2, generally, than warm water.
Back to the question posed..........Way to throw a wrench in the gears lol
So I because it expand will it have more less o2
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BGA in thr summer: as temp increases, so does the metabolic rates of bacteria and .......plants.
So if the tank is cooking along.........winter, then spring.......summer it is 5C warmer...... you'd expect faster growth in the plants and bacteria.
If you dose the same ferts, same CO2, this will lead to algae if you added just enough when it was cooler, now you will be limited, likely NO3 in your case.........and that will lead BGA, limiting NO3 is a good way to induce BGA, add higher temps, and it's even better.
Cooler temps slows the tank growth rate down, increased dissolved gases like O2, but since we dose CO2, you may need LESS when it's cooler than you might when it get swarm.
MANY hobbyists see differences seasonally with algae, this is likely why(less CO2). If you try and adjust CO2 in the cooler aquarium, it's pretty easy and you do not gas the fish as much, have much less risk associated. So plants are well fed the CO2.
But if you run a tank with say 85F temps and the O2 will lower......often 2ppm or more lower..... vs say 75F. This influences fish and breathing/respiration..........so at cooler temps, the fish are less active generally, and there's more O2......and the CO2 demand is lower.
At warmer temps, it is harder to get more O2, so you also have a higher demand for CO2, this causes more problems with plant growth.
The issue is more about the plants not growing, rather than what induces algae.
Obviously you do not want to gas the fish either, so provide ample current and rippling on the surface......wet/dry filters, lower temps if possible that target those fish species. This will allow the max wiggle room adjusting the CO2, the min stress on fish with CO2 and then this = min algae issues.
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