Shrimpacide - Bubble Counter Suggestions? - The Planted Tank Forum
 
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post #1 of 4 (permalink) Old 06-04-2008, 09:16 PM Thread Starter
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Shrimpacide - Bubble Counter Suggestions?

I just added CO2 to my 40 gallon custom tank. I set it up to 3-4 bps and got INSANE FLOW from the ceramic glass diffuser. I thought it looked to much and in a few hours my ghost shrimp died (hopefully they dont haunt the tank). I tested the H2O and got 7 KH and 6.3 PH. Did partial WC with RO and dropped KH to 4.
I see people using 3-4 BPS in 10 gallon tanks with good results. Why do I have such high flow out of the diffuser? I am almost positive that CO2 killed the shrimp. Should I just scale back the bubble rate or mess with the KH more? According to the CO2 chart I need a KH of like 2 for my PH level.
Any suggestions?
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post #2 of 4 (permalink) Old 06-04-2008, 10:50 PM
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3-4 BPS is a lot for a 10g. Adjust the co2 down until you get your desired PPM. 1-2 BPS should be plenty, depending on how good your diffuser is, your filter, etc.

Don't fiddle with your KH unless you know what you're doing. Stability is more important than anything with water parameters.
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post #3 of 4 (permalink) Old 06-10-2008, 06:27 PM
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What was your pH before CO2? The purpose of the chart is to determine your target pH based on your KH. Adjusting your KH won't help because pH is directly tied to KH (ideally) and you'll come out with the same CO2 levels after you do the math. In other words, adding CO2 at 4bubbles/sec with a KH of 3 should give you roughly the same concentration of CO2 with a KH of 6. The problem with using the chart is that in some situations, the pH is thrown off by other things. A good check to see if your setup follows the KH/pH/CO2 equation is to measure pH and KH after the tank is idle for 24hours without co2. Apply the values to the table and you should see 2-3ppm CO2. If not, then you'll have to adjust the table accordingly. Assuming a KH of 3-6deg, a 1pH drop from CO2 injection equates to safe levels of CO2. A drop checker is probably the easiest and most reliable way of monitoring CO2.
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post #4 of 4 (permalink) Old 06-10-2008, 07:47 PM Thread Starter
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Thanks for the advise. I am figuring all this out as I go. This site is very helpful. I was able to scale back my CO2 to 1 bps and my PH has been stable at 6.4-6.7. The fish are fine and the plants are thriving. I got new leaves on two annubis, my pennywort has exploded and all the leaves on my java ferns split. Amazing for just a week of CO2. I think with the PH stable in that range, and the CO2 to 1-2 bps shrimp will be fine.
Thanks
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