Non Co2 Tanks

Captain, of course the percentage of CO2 in the atmosphere is a lot greater than the amount that would be found in an uninjected aquarium - 300 ppm to 500 ppm, ballpark, in the air, compared to 3 or 4 ppm or so in the aquarium.

My point was that the natural processes in an aquarium (mainly respiration) generate CO2 in addition to that which is absorbed from the atmosphere, and that is what would be lost if the surface of the water were unduly disturbed.

Bill
 
Yes, the movement of the surface water would mix into the aquarium CO2, O2, and whatever else was in the atmosphere around the aquarium.

But, the atmosphere supplies .50 to 1 ppm of CO2 ito the "typical" planted aquarium. Respiration of organisms in the aquarium supplies an additional 1.5 to 2 ppm, yielding the 2 to 3 ppm "normal" CO2 levels of planted aquaria.

Surface agitation would replace the higher CO2 levels in the tank with the lower levels from the atmosphere.

Here is a post from George Booth that covers some of these things.

http://fins.actwin.com/aquatic-plants/month.9606/msg00381.html

Bill
 
Non CO2 with 2x40w will do nicely.
It will also do nicely with CO2 FYI.

I would recommend a Triton bulb and a cool white.
That gives a nice combo.

Generally folks add a fair amount of orgasnic matter, (ground Peat, or soil or manure of some sort-boiled, cooked or soaked(3 weeks)).
Peat is what I use.

The amount of CO2 is fairly small given off by the breakdown and does not last particularly long either from these sources.

Peat is the slowest to break down of all of them.

About 1" of wetted peat and 3" of 2-3mm gravel(Onyx sand works extremely well).

Plant well, have 10-25% floating plants for extra benefits.
Do not do water changes, seems weird, but refrain.
Top off for evaporation.
Feed fish well, this is a kep component, you need fish, SAE's, Shrimps etc are good to eat algae.

Things should balance out for you over time by doing these things.

You can use excel or CO2 also, it's rather easy at this light level also.

Regards,
Tom Barr
 
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