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Old 20-04-2003, 07:22 AM
Jim Miller
 
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Default CO2 & Surface Agitation Debate-Please Comment!

different tanks, different plumbing yield different results but a good guess
would be 10lb tank would last most of a year if not more. fill at beverage
distributors, fire extinguisher service outlets, welding suppliers. look for
them in the yellow pages.

10lb refill is probably $20 or less on average.

jtm

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"Christopher" wrote in message
hlink.net...
where does one purchase C02 to put in a canister? and about how much would
it run for a 125g tank yearly?
"Chuck Gadd" wrote in message
...
On Thu, 06 Feb 2003 13:14:01 -0800, Dave Millman
wrote:

Surface agitation is GOOD: without it, plants will extract the CO2,
driving pH up, particularly in tall tanks. CO2 levels in non-injected


yes.


Maintain enough surface agitation such that fish never gasp at surface.
Pay close attention to fish in the morning before lights come on, as


Just maintain good water circulation. This will increase the amount
of water in contact with the surface air, which increases the O2
level.

If you have PRESSURIZED CO2, a little more surface agitation is not
quite as critical as with DIY, as bottled CO2 is relatively inexpensive.


I agree.

INJECTED TANKS WITH TIGHT COVERS
In this case, outgassing CO2 can accumulate under the cover, displacing
atmospheric O2, which will dramatically lower O2 levels in the water.



Your list looks very complete.


Chuck Gadd
http://www.csd.net/~cgadd/aqua