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post #1 of 13 (permalink) Old 08-22-2008, 08:00 PM
rick4him
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co2 question

I know this sounds weird but can to much co2 cause bba? I know a low amount can, but I have mine turned up rather high, and I am getting bba. Could it be because the co2 level has changed and that is causing the BBA?

Thoughts?
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post #2 of 13 (permalink) Old 08-22-2008, 08:59 PM
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BBA is always caused from insufficient Co2.


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post #3 of 13 (permalink) Old 08-22-2008, 09:10 PM
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I am also interested in other peoples answer to this question. Like you, I read that low CO2 causes BBA so I continually turned it up. BBA eventually covered most plants in my tank and started growing on the glass surface. The battle against BBA almost led me to give up on planted tanks in May.

This summer because of work and other commitments I was unable to fill my CO2 tank for over two months. I also cut my fertilizer dosing back to almost nothing. Last week I realized that most of the BBA was gone. I now have the same question as you, was it the CO2 or my dosing?

I think my plan will be to add the CO2 and ferts back at low levels to see what happens.
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post #4 of 13 (permalink) Old 08-22-2008, 09:21 PM
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Insufficient flow or diffusion can be the culprit, if CO2 levels are indeed "high enough." You can have "good" levels in certain areas of the tank, but if there isn't proper flow to mix and distribute the co2, BBA can still thrive. Tom Barr has been doing some interesting stuff with measuring co2 levels, and it seems to show how much co2 can be reduced by plant beds and other obstacles that reduce flow

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post #5 of 13 (permalink) Old 08-22-2008, 09:33 PM
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BBA is not caused by high Co2. Too much light for you Co2 level is the only reason BBA comes about.

Turning up your bps doesn't necessarily make your Co2 levels higher if your diffusion method is not effectively dissolving or dispersing Co2.

Here are some things that will affect levels:

Lack of movement within the tank.
Diffusion/dissolving method inefficient.
Too much plant mass.
Low injection rate (bps)


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post #6 of 13 (permalink) Old 08-22-2008, 09:35 PM
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Quote:
Originally Posted by mrkookm View Post

Turning up your bps doesn't necessarily make you Co2 levels higher if your diffusion method is not effectively dissolving or dispersing Co2.

Here are some things that will affect levels:

Lack of movement within the tank.
Diffusion/dissolving method inefficient.
Too much plant mass.
Low injection rate (bps)
Bingo

Mike


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post #7 of 13 (permalink) Old 08-23-2008, 12:06 AM
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I also seem to have gotten some GSA while I was on vacation. I had someone giving ferts, but I didn't feed. Could that have dropped the nitrites and thus causes a very small gsa outbreak? (along some sides of the tank?)

Also I am using a reactor so I would think my co2 is being broken up nicely. Do the lilly pipes do a good job at moving the water around? I really don't want to add a power head as it would REALLY mess up the look of my tank.

thoughts.?
post #8 of 13 (permalink) Old 08-23-2008, 12:18 AM
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GSA tends to be related to low phosphates and high light.

The BBA IS caused by poor co2. So you need to figure out what's wrong there. mrkookm has given you good examples of what could cause this problem.

Mike


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post #9 of 13 (permalink) Old 08-23-2008, 05:20 PM
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Quote:
Originally Posted by rick4him View Post
I also seem to have gotten some GSA while I was on vacation. I had someone giving ferts, but I didn't feed. Could that have dropped the nitrites and thus causes a very small gsa outbreak? (along some sides of the tank?)

Also I am using a reactor so I would think my co2 is being broken up nicely. Do the lilly pipes do a good job at moving the water around? I really don't want to add a power head as it would REALLY mess up the look of my tank.

thoughts.?
Lily pies do a great job of moving water around.
A drop checker would come in handy to see if you do in fact have enough CO2... Do you have one, or just remove it for photos?


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post #10 of 13 (permalink) Old 08-23-2008, 05:37 PM
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Originally Posted by rick4him View Post
I really don't want to add a power head as it would REALLY mess up the look of my tank.

thoughts.?
You want an inline reactor and a drop checker, a good alternative to teh reactor is to diffuse micro-bubbles (from a limewood or glass diffuser) into the filter outflow so the bubbles are pushed throughout the tank. The drop checker will tell you when you've achieved proper diffusion. In the meantime, shoot the BBA point blank with a med syringe full of flourish Excel to kill it (do it while the filter is off for five minutes or so), note that it'll come back until you improve diffusion or lower your lighting.
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post #11 of 13 (permalink) Old 08-23-2008, 10:39 PM
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You want an inline reactor and a drop checker, a good alternative to teh reactor is to diffuse micro-bubbles (from a limewood or glass diffuser) into the filter outflow so the bubbles are pushed throughout the tank. The drop checker will tell you when you've achieved proper diffusion. In the meantime, shoot the BBA point blank with a med syringe full of flourish Excel to kill it (do it while the filter is off for five minutes or so), note that it'll come back until you improve diffusion or lower your lighting.
Thanks I do use an inline reactor, and I do indeed use a drop checker. My drop checker is almost a clear yellow. I was told I could crank it up as much as I wanted as long as the fish seem to be doing ok. So I know I have a good deal of co2 in the tank. So I'm not sure where my issue is.
post #12 of 13 (permalink) Old 08-24-2008, 01:03 AM
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One of my aquariums had BBA for a while and I couldn't get rid of it. Excel, H2O2, spot treating, etc didn't work.

I swapped out the 65w 6700K bulb for a 55w GE 9325K bulb and the BBA went away.

This aquarium has EC, pressurized CO2 with a pH controller, EI dosing and 50%+ weekly water changes.

Even if I get a little slack about dosing or water changes, the BBA doesn't come back.

I don't know how it keeps BBA away, but it does in this aquarium.

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post #13 of 13 (permalink) Old 08-24-2008, 02:01 AM
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Hmm. that is strange. I am using the Grand Solar one light and the bulbs that came with it so I doubt the lights or any issue for me....
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