[APD] Re: DIY CO2 in terrariums?

[Tony Eales <s328962 at student_uq.edu.au>]

At 10:08 AM 6/02/04 -0500, you wrote:
> I'm looking at trying to grow marsilea and a small sword in a fish bowl -
> the trick is that I don't want much water.  I want to get the both growing
> emersed.
>
> Can you use DIY CO2 and have the tubing just "dumping" CO2 into a covered
> fish bowl?  CO2 is heavier than air so it would settle at the bottom and
> displace the normal air, right?

Yep. That's pretty much what I'm doing. Most people recommend having the 
water level initially high and slowly lowering it to allow the plant to 
develop emersed growth. I'm too impatient for this and usually just whack 
things into the terrarium and let them struggle through. As a compromise I 
would have the water level just enough to cover the crown of the sword. It 
should go to emersed growth easily. Them Marselia should have no particular 
problems adjusting if they are anything like the Australian species I am 
familiar with and might actually overwhelm the terrarium. The only thing to 
watch out for is fungus attack in the early stages of the terrarium. You 
could sterilise the soil either by boiling it or leaving it in the sun in a 
black garbage bag for a few days or use nursery type anti-fungus sprays or 
simply accept you might lose a few plants at first as it doesn't take long 
to settle down IME, YMMV.

> Just wondering if anyone has played with it - or if you have any tips on
> moving a baby, submersed sword over to an emersed enviroment.  Thanks.
> Chris

Tony Eales
333 Whites Rd
Lota, Brisbane 4179
Ph (07) 3365 6958
Home (07) 3396 8496

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