how can I maintain a high co2 level while having a large air pump running? - The Planted Tank Forum
 
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post #1 of 11 (permalink) Old 08-11-2004, 04:33 AM Thread Starter
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how can I maintain a high co2 level while having a large air pump running?

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post #2 of 11 (permalink) Old 08-11-2004, 04:43 AM
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Depends on if that large air pump is being used on the same tank that you're injecting CO2 into

May I ask why do you need to run the air pump? If you have an airstone running you're going to be outgassing a lot, if not all, the CO2 you're injecting. If you're running a presurized system be prepapred to refill your tank often. If you're trying this with a DIY yeast bottle then it's a lost cause.

óBill

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post #3 of 11 (permalink) Old 08-11-2004, 08:44 PM Thread Starter
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the fish tend to die when the pump isn't running
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post #4 of 11 (permalink) Old 08-11-2004, 08:51 PM
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Do you have any significant number of plants in the tank? If you do, then you should not have any problems with the CO2 killing the fish or have any problems due to a lack of oxygen. What are your tank parameters? Have you tested your water recently?
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post #5 of 11 (permalink) Old 08-11-2004, 08:58 PM
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Try Excell for carbon, not CO2 injection

If you insist on having an airstone, then you could try Seachem Excell for carbon.

But, really, if you have good lights, and CO2 but not too high, and reasonable fertilization, the plants ought to be making lots of O2.

Too heavy a fish load plus too many plants could lead to low O2 by morning. Fish damaged by high ammonia during initial cycle may be overly sensitive.
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post #6 of 11 (permalink) Old 08-12-2004, 04:56 AM
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'the fish tend to die when the pump isn't running'
Give us some information on your tank's parameters. Especially the kH of your water, but the others are necessary as well.
From the sounds of it, you are pushing too much CO2, which would cause fish deaths, but without knowing about the tank we would just be guessing.
Reply with as much information about the tank as possible.

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post #7 of 11 (permalink) Old 08-12-2004, 06:26 AM Thread Starter
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the acidty and hardness are in great condition but the thing i am concern with is 1. i did a 50%x2 water change 3 days before putting the fish in,
2. i don't have a bubble counter, so don't really know if i am overdosing or not
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post #8 of 11 (permalink) Old 08-12-2004, 06:27 AM Thread Starter
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the acidty and hardness are in great condition but the thing i am concern with is 1. i did a 50%x2 water change 3 days before putting the fish in,(cuz my tank was growing tiny water worns..., its fine now)
2. i don't have a bubble counter, so don't really know if i am overdosing or not
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post #9 of 11 (permalink) Old 08-12-2004, 10:39 AM
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I don't think we're going to be able to give you much advice unless we know at least the following:

- What kind of CO2 setup you have.
- Heavily planted?
- How much light?
- Size of tank?
- Fish load?
- KH, GH, pH, NO3...

It is extremely difficult, IMO, to overdose CO2 if you have a tank with lots of healthy plants. Are your fish "gasping" at the surface?

Any other relevant info would be a plus...

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post #10 of 11 (permalink) Old 08-12-2004, 12:44 PM
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If you are unable to give more details then we are actually unable to help you. What you have done is equivalent to calling 911 and not telling them what is happening or where you live.

I guess to answer the question you asked is easy. NO. Pure and simple NO. Now, if you are unable, unwilling, or incapable of answering follow up questions then I guess we have to leave it at that.

Saying that parameters are fine without giving details is almost always a red flag in my eyes. It either means that you think you know more than we do or you lack the means or ability to supply the answer.

The lack of a bubble counter could be solved in about two minutes. See this picture http://rexgrigg.com/bubblecounter.jpg for how I build my own. If you have questions ask.

Were the fish the died new additions to the tank? How long has the tank been running? What type of fish? How many fish? How large of fish? What size tank? If you could take five minutes to give us a run down on your tank we could give you detailed answers. As it stands right now the only answer we can give you is NO.
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post #11 of 11 (permalink) Old 08-12-2004, 01:58 PM
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For the record, a bubble counter doesn't solve much, other than it gives you a visual rate of CO2 injection. However 20 bubbles per minute in one tank might only give you 15ppm of CO2...while 20bubbles per minute in another tank could put you at 100ppm of CO2!

Tell us your pH
Tell us your Kh
And: ammonia level, nitrite, nitrate.

You say "the acidty and hardness are in great condition..." which tells me 'this person has no clue what his water parameters are, and probably should NOT be injecting CO2'
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