CO2 meter use and data

I'm very curious to know the results!!

regards,
dutchy

 

It would be nice to have some data which I can use (graphs etc) There's a lot of resistance here against high CO2, mostly because of fish health. If I had some graphs which would show calculated and actual CO2 levels, that would help a lot.

Anyway it's strange. Almost no one thinks about O2 levels and fish health, they take it for granted and assume it's enough. But when it comes to CO2....

I don't want to give you a lot of work, but if it's possible it's a "nice to have".

regards,
dutchy

 

what is high???
personally, a max of 30 ppm is simply not high.
various tanks that I measured contained 40-60 ppm CO2. the shrimps in those tanks were alive and kicking!

so, wat is the max?? my best guess is that 100-150 ppm is te maximum tolerable CO2 level. of course, this all depends on current, O2, fish load etc.

greets,

yme

ps: statements above hold only true if the oxyguard co2 meter is accurate at the measured values. (did not test it, manual states a 0-50 ppm range)

 

Of course I should have specified. Let's say 40 ppm, which Tom uses frequently and also Tropica mentions as maximum?

Try to make these statements on a forum like AF. You better be ready for a 10 to 1 discussion.

regards,
dutchy.

 

hihi.... as you know, I am not a member of AF, but I doubt anyone there has a co2 meter. Then it would be kind of a difficult discussion, wouldn't you say


but to come back to the O2/CO2 relation...... if the ratio is the most important thing: is my previous suggestion to control oxygen levels in the tank by an O2 electrode/solenoid valve/O2 tank very stupid??

greets,

yme

 

I think an aerator pump and stone and a sensor that can make the power switch on/off would be enough. I kind of doubt if you really need it with good surface agitation, but that's just an assumption.

regards,
dutchy

 

complete lack of knowledge from my side for sure!

just an airpump 24/7 is cheaper but can you increase the O2 level with a simple airstone beyond 8-9 mg/l? wouldn't you at least need some kind of reactor?

another point: would it be a good idea to lower the temperature of the tank 1 degree celcius? the colder the water, the more O2 it can contain. would a simple 1 degree drop contribute significantly to the ability of animals to cope with a higher CO2 levels?

and another thought: could you increase O2 levels by using ozone?? as we know, philips produces the "tropical aquarium purifier" an ozone apparatus for aquaria. although tom said that it doesn't do much/anything, I am wondering if you could increase the o2 level this way.
greets,

yme

 

kind of off topic, but can you tell me a liitle bit more? What was the behaviour change?

regards,
dutchy

 

seems like a simple idea, right?
do you have any idea whether a drop from 24 to 23 degrees celcius would make a significant difference in the capability of fish to cope with high co2?
and do you know how much slower plants will grow when you lower the temperature 1 degree celcius? would it help in reality to limit growth (if you just lower the temp 1 or 2 degrees)
if it is significant, then it would be a good advice to lower the temp if you have stunting plants (due to low co2). lowering the temp would than be good for 2 reasons: 1: you can have higher co2 levels and 2: plant metabolism is slower.

probably this is just TOO easy, right?

in any case: I am looking forward to the results!!!

greets,

yme

 

Not, Ifear, As Great As We Might Hope

Hi,

Yes lowering the temperature help and in the range of aquarium temperatures, it is “relatively” dramatic, not sure, it is a great as we might hope.

Graphically http://www.engineeringtoolbox.com/gases-solubility-water-d_1148.html, scroll down to CO2.

General Temperature and Pressure Effects on Solubility, http://www.elmhurst.edu/~chm/vchembook/174temppres.html.

This is a pretty-good explanation of the temperature pressure relationship for CO2 solubility http://www.google.com/url?sa=t&source=web&cd=6&ved=0CCsQFjAF&url=http%3A%2F%2Fwww.thuisexperimenteren.nl%2Finfopages%2FCarbondioxide%2520in%2520water%2520equilibrium.doc&rct=j&q=carbon%20dioxide%20solubility%20water%20temperature&ei=JnOBTNaBIou8sQPEg-X2Bw&usg=AFQjCNHvYAEVjGEMBr_XoRKJa_r4wvZ0Gw&sig2=1EaGHWHXcrC-I06ozNu11A&cad=rja .
MS Word Viewer http://www.microsoft.com/downloads/details.aspx?FamilyID=3657ce88-7cfa-457a-9aec-f4f827f20cac&displaylang=en.

I will look at what I have and see if posting it would help.

Biollante

 

I've been thinking for some time. So, I already have some plans to play with them. I almost bought one for myself, but I think a very good accuracy in the scale of the use of low enriched cultivation of non-carbon dioxide tanks.