rising waters
 

I just don't get it, my tank water rises by itself.

I do a 20% water change on my 66g and I stop filling before the water
line reaches a DIY glass shelf which holds up part of my glass cover. I
then do my usual maintenance and when I'm finished, it all looks fine.
About an hour later, the water level has gone up and touched a portion of
the glass cover so that I can see it from inside the tank (drops below
the water surface). Several hours later and more of this glass portion
is now underwater. Either my aquarium is shrinking or the water level is
going up. After several hours, the waterline stops rising and stays
high, slowly dropping from evaporation until the next water change.

I know I'm really opening myself up to some snide comments (and yes, I
already know that I'm somewhat crazy), but I have watched this happen
many times and cannot figure out what the mechanism is. The water is
from my well, so it's under higher pressure and has more dissolved gases
in it (which is normal for well water). I've been using it from my tap,
so it's somewhat softened and at the right temperature (if that makes any
difference).

So water expands its volume when it outgases ? If anything, I would
expect the result of outgasing to be a net decrease in volume, but I'm
chemistry-challenged, and all I remember from physics is that liquids
can't be compressed (which apparently isn't correct).
--
www.NetMax.tk

NetMax wrote:

About an hour later, the water level has gone up and touched a
portion of the glass cover so that I can see it from inside the tank
(drops below the water surface). Several hours later and more of
this glass portion is now underwater.


The fish are, um, peeing? :)



--
Eric Schreiber
www.ericschreiber.com

"Eric Schreiber" eric at ericschreiber dot com wrote in message
...
NetMax wrote:

About an hour later, the water level has gone up and touched a
portion of the glass cover so that I can see it from inside the tank
(drops below the water surface). Several hours later and more of
this glass portion is now underwater.


The fish are, um, peeing? :)


lol *groan*
--
NetMax

--
Eric Schreiber
www.ericschreiber.com

"NetMax" wrote in message
. ..
"Eric Schreiber" eric at ericschreiber dot com wrote in message
The fish are, um, peeing? :)


lol *groan*
--

Contrary to common belief, fish is actually peeing, but it can't pee more
than the water it takes in, so I doubt this would be the reason ;)

"NetMax" skrev i meddelandet
. ..
I just don't get it, my tank water rises by itself.

I do a 20% water change on my 66g and I stop filling before the water line
reaches a DIY glass shelf which holds up part of my glass cover. I then
do my usual maintenance and when I'm finished, it all looks fine. About an
hour later, the water level has gone up and touched a portion of the glass
cover so that I can see it from inside the tank (drops below the water
surface). Several hours later and more of this glass portion is now
underwater. Either my aquarium is shrinking or the water level is going
up. After several hours, the waterline stops rising and stays high,
slowly dropping from evaporation until the next water change.

I know I'm really opening myself up to some snide comments (and yes, I
already know that I'm somewhat crazy), but I have watched this happen many
times and cannot figure out what the mechanism is. The water is from my
well, so it's under higher pressure and has more dissolved gases in it
(which is normal for well water). I've been using it from my tap, so it's
somewhat softened and at the right temperature (if that makes any
difference).

So water expands its volume when it outgases ? If anything, I would
expect the result of outgasing to be a net decrease in volume, but I'm
chemistry-challenged, and all I remember from physics is that liquids
can't be compressed (which apparently isn't correct).
--
www.NetMax.tk


I guess it's "Tsunami" !

Pepe

NetMax wrote:
I just don't get it, my tank water rises by itself.

Hmmm, trust you to come up with a question that probably has no known
cause :)

You say the water you use is under higher pressure and contains
dissolved gases. I don't even remember doing chemistry at school so
here's a real stab in the dark which I don't even understand myself.
Could it be that the gases become undissolved in the tank and/or maybe
uncompressed and therefore expand the water?

Oh well, I tried :)

cheerio
miskairal

Does the water temperature change from the time it goes into your tank and
the time the water level rises? The only other think I can think of is that
your filters are stopped temporarily, hold water, then discharge more than
they use when restarted.
Denise
"NetMax" wrote in message
. ..
I just don't get it, my tank water rises by itself.

I do a 20% water change on my 66g and I stop filling before the water
line reaches a DIY glass shelf which holds up part of my glass cover. I
then do my usual maintenance and when I'm finished, it all looks fine.
About an hour later, the water level has gone up and touched a portion of
the glass cover so that I can see it from inside the tank (drops below
the water surface). Several hours later and more of this glass portion
is now underwater. Either my aquarium is shrinking or the water level is
going up. After several hours, the waterline stops rising and stays
high, slowly dropping from evaporation until the next water change.

I know I'm really opening myself up to some snide comments (and yes, I
already know that I'm somewhat crazy), but I have watched this happen
many times and cannot figure out what the mechanism is. The water is
from my well, so it's under higher pressure and has more dissolved gases
in it (which is normal for well water). I've been using it from my tap,
so it's somewhat softened and at the right temperature (if that makes any
difference).

So water expands its volume when it outgases ? If anything, I would
expect the result of outgasing to be a net decrease in volume, but I'm
chemistry-challenged, and all I remember from physics is that liquids
can't be compressed (which apparently isn't correct).
--
www.NetMax.tk

NetMax wrote:

I just don't get it, my tank water rises by itself.

Gather more data points. Test in a liter sized beaker, so you can tell
precisely how much the volume changes. Also, weigh the beaker of water
at various stages along the way.


--
Eric Schreiber
www.ericschreiber.com

That is what I would say. As a fact, water tends to take up more space as
it gets cooler, hence when when water freezes, it expands into the ice.

Is the filter possibly causing more oxygen from the air to dissolve into the
air, therefore causing the volume to go up as well?

Any Co2 or any other items that you inject into the water? Live plants that
grow?

Brian S.

"Denise" wrote in message
news:3P%Ad.12589$tG3.3838@trnddc02...
Does the water temperature change from the time it goes into your tank and
the time the water level rises? The only other think I can think of is
that
your filters are stopped temporarily, hold water, then discharge more than
they use when restarted.
Denise
"NetMax" wrote in message
. ..
I just don't get it, my tank water rises by itself.

I do a 20% water change on my 66g and I stop filling before the water
line reaches a DIY glass shelf which holds up part of my glass cover. I
then do my usual maintenance and when I'm finished, it all looks fine.
About an hour later, the water level has gone up and touched a portion
of
the glass cover so that I can see it from inside the tank (drops below
the water surface). Several hours later and more of this glass portion
is now underwater. Either my aquarium is shrinking or the water level
is
going up. After several hours, the waterline stops rising and stays
high, slowly dropping from evaporation until the next water change.

I know I'm really opening myself up to some snide comments (and yes, I
already know that I'm somewhat crazy), but I have watched this happen
many times and cannot figure out what the mechanism is. The water is
from my well, so it's under higher pressure and has more dissolved gases
in it (which is normal for well water). I've been using it from my tap,
so it's somewhat softened and at the right temperature (if that makes
any
difference).

So water expands its volume when it outgases ? If anything, I would
expect the result of outgasing to be a net decrease in volume, but I'm
chemistry-challenged, and all I remember from physics is that liquids
can't be compressed (which apparently isn't correct).
--
www.NetMax.tk

"NetMax" wrote in message
. ..

So water expands its volume when it outgases ? If anything, I would
expect the result of outgasing to be a net decrease in volume, but I'm
chemistry-challenged, and all I remember from physics is that liquids
can't be compressed (which apparently isn't correct).
--

I don't think water temp has anything to do with it like someone suggested
because 1) you said the temp is matched to the tank, and 2) everybody would
be having this problem if it had something to do with temperature.

If the well water is outgassing then that could be your problem. Take a
glass bottle of coke and note the liquid level. Shake the bottle, stand
back a little, and open the top. What you see is outgassing of dissolved
gasses in the liquid. The volume of the soda expanded rapidly in that case,
and apparently much more slowly in yours. Another way to think of it is if
a gas bubble forms in the water when there was none originally, then the
total volume of the liquid/gas has to increase. You should mark a glass of
water and then check it again in a few hours. That way you see whether it
has anything to do with the tank itself.

I don't know why/how the well water would be offgassing slow slowly. I
don't know much about that. Let us know what you find out!

dwhite