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post #1 of 14 (permalink) Old 02-14-2010, 01:42 AM Thread Starter
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super high c02

I just set up a planted 29 gallon tank a few days ago. Im injecting c02 through an eheim 2215. I thought I set the c02 to 2 bubbles a second but the next day I saw 6 bps. I now have a ph of 5 and a kh of .5. What should I do? There are no fish I have italian vals, narrow leaf chain swords, and a red tiger lotus bulb that hasnt sprouted yet.
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post #2 of 14 (permalink) Old 02-14-2010, 01:43 AM
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Sounds like either your co2 cylinder was cold when you set it up, so just turn the needle valve back down to two bps, or maybe you have a milwaukee reg, or both.

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post #3 of 14 (permalink) Old 02-14-2010, 01:46 AM
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Turn down the CO2, and add a pinch of baking soda to bring the KH up a bit.
In a 29 gallon tank 1 teaspoon of baking soda will raise the KH by 2 degrees. This will help stabilize the pH. If the KH drops again, you may have to keep adding baking soda for a while.

If the CO2 bubble counter keeps changing maybe there is a problem with part of the CO2 equipment.

Good that you have not added fish, yet. Good to get all these bugs worked out before the fish arrive.
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post #4 of 14 (permalink) Old 02-14-2010, 02:05 AM
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If you are new to CO2 it couldn't hurt for you to invest in a cheap drop checker and either buy or make some 4 dKH water to use with it, the other thing you would need is bromothymol blue which is standard pH reagent. You can use the drop checker to determine how many bps you need to turn it green. That is a good level for your plants and a safe level to start off with when you add fish after the tank is cycled.
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post #5 of 14 (permalink) Old 02-14-2010, 02:09 AM Thread Starter
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Thanks for the speedy replies guys. I already turned the c02 down and will add baking soda. I was mainly worried about the water being to acidic for the plants. The bottle probly was just cold it was sitting out in the garage till I set it up.
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post #6 of 14 (permalink) Old 02-14-2010, 02:10 AM Thread Starter
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I also have an azoo reg
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post #7 of 14 (permalink) Old 02-14-2010, 02:33 AM
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Sitting out in the garage in the central valley would definitely make the bottle of CO2 so cold. Monitor the conditions, things should stabilize.
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post #8 of 14 (permalink) Old 02-14-2010, 05:54 AM
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I have owned two of the Azoo regulators. The body and solenoid work fine. They are practically foolproof because the working pressure is preset. You can't blow a low pressure gauge like you can with a Milwaukee or Cornelius regulator if you didn't lower the working pressure to zero before you swapped out the CO2 cylinders.

The Azoo needle valve is temperature sensitive causing the bubble count to vary or drift. Even changes in room temperature can make it vary. If you would replace the stock needle valve with an Ideal, Swagelok or Parker metering valve; you'd have a good working piece of equipment. The Ideal valve is about $65 plus assembly parts and shipping. Sometimes you can find Swagelok, Nupro, Whitey and Parker metering valves cheaper at various places. Their list price can be very high depending on the model. A Fabco NV-55 needle valve is another good alternative. They are around $22 plus assembly parts and shipping.


Azoo Regulator




This is the commonly used Ideal 52-1-12 metering valve.



The following are various styles of Swagelok metering valves.






The very good Fabco NV-55 needle valve can be mounted inline.

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post #9 of 14 (permalink) Old 02-14-2010, 08:13 PM Thread Starter
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Thanks for the info left c. I think Ill be ok the temp in my house is pretty constant about 68-70F all the time. I added three teaspoons of baking soda my kh only went up 1 degree. I also moved my spraybar up to aerate the water a bit do you think this will work? I may just have to do a waterchange. My kh out the tap is 4 the ph is 8.
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post #10 of 14 (permalink) Old 02-15-2010, 12:41 AM
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Give the baking soda more time to dissolve.

What would be removing carbonates in your tank? Do you have Soil Master Select or Turface Substrate? Or one of the ADA products?
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post #11 of 14 (permalink) Old 02-16-2010, 06:34 AM Thread Starter
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Im using the substrate from aquariumplants.com which I believe is turface. I think I have it sorted my ph is at 7 and my kh is 6 Ill monitor to see if those numbers hold steady thanks guys.
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post #12 of 14 (permalink) Old 02-16-2010, 06:59 AM
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In the end you will likely want to replace that needle valve with one of those mentioned by left c. The stock valve is very finicky and you will get sick of dealing with it.
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post #13 of 14 (permalink) Old 02-16-2010, 02:37 PM
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OP how long have you had your Azoo regulator? I suspect it is rather new. Or new to you.... Just keep adjusting the standard needle valve you will find a happy medium and after a while it will stay where you want it. Might take a couple of days. I have three of those setups and and they are rock solid in BPS and never vary with temperature. It does take a little practice to get them dialed in. There is little reason to run out and purchase an expensive needle valve.
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post #14 of 14 (permalink) Old 02-17-2010, 03:00 AM
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Turface/ Soil Master Select/ that substrate will continue to remove the KH from the water. Stay on top of it! It took about a year to stabilize one of my tanks, but I was not so consistent at adding baking soda.
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