Fishes and Co2 - The Planted Tank Forum
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post #1 of 3 (permalink) Old 12-03-2003, 05:18 PM Thread Starter
Algae Grower
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I am constructing my DIY CO2 injector.
My only real concern is the health of my fishes and the addition of CO2 to the tank.
I have a 55 gal, pH @ 8.0, Temp 80-82 deg
I have 4 Madagascar cichlids and an algea eater.
The fishes are my primary concern, but I also would like to provide them with an environment that is more natural and provides more cover and greenery.
I currently have just a few plants in the tank but I am waiting for more to be delived. I have 2-40W, 2-30W lighting system, bearly above 2.5 wpg
I am waiting on some Apono. Ulvaceus, Apono. Boivinians, Vals, Java fern and a couple or small plants.
What is the best way to control the amount of Co2 that is produced and injected into the tank? Dont need it to be too high and harm the fishes.
Some people have said FISH OR PLANT. Why not fish AND plant.
How long after I have added the plants should I start adding the CO2.
++ Currently 1 of my fishes is about to lay eggs, when should I make the changes and additions?
Thanks for your help
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post #2 of 3 (permalink) Old 12-03-2003, 05:40 PM
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With a pH of 8.0, I am guessing your tap water also has a fairly high degree of hardness. Do you have a Carbonate Hardness (dKH) test kit?
When you inject CO2, pH will drop somewhat, but the buffering capability of hard water such as yours will keep it from dropping very quickly or very far.
You can add the CO2 before the plants but I would wait to add it until the eggs have hatched. Then again, the pH drop might encourage them to lay the eggs. You never know.

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post #3 of 3 (permalink) Old 12-03-2003, 06:02 PM
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The problems is that DIY CO2 doesn't offer a lot of control over the amount of CO2 you get. This is one of the big advantages of a pressurized system.
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