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post #1 of 13 (permalink) Old 06-18-2005, 01:11 AM Thread Starter
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1 bubble per second

Does it sound right that 1 bubble per second in about 40gal of water (tank is oceanic 50 but really holds closer to 40gal water) should bring CO2 to only 38ppm?

pH = 6.6
Kh = 5.1
PO4 = 3 - 4
NO3 = 10 - 20

I would have thought 1bble per second should raise it much higher?
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post #2 of 13 (permalink) Old 06-18-2005, 01:26 AM
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That sounds a bit right if not even high.

And CO2 is really not measured in BPS. It's a convenient guide for YOUR system based on YOUR experience. It's meaningless once you move more than a foot away from your CO2 system.

The true measure of any CO2 system is will it give you the CO2 levels you seek without much trouble.
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post #3 of 13 (permalink) Old 06-18-2005, 01:28 AM
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I agree with Rex,
I have a 46 and i am running 2-3 bubbles a minute at about 60-70ppm of co2.
jB
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post #4 of 13 (permalink) Old 06-18-2005, 02:28 AM
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i am at 2bps in my 40g's of water and getting 55ppm

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post #5 of 13 (permalink) Old 06-18-2005, 02:28 AM
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Quote:
Originally Posted by Jason Baliban
I agree with Rex,
I have a 46 and i am running 2-3 bubbles a minute at about 60-70ppm of co2.
jB
i assume you mean seconds? otherwise I am way off too

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post #6 of 13 (permalink) Old 06-18-2005, 03:54 AM
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I agree that there are too many variables (KH, needle value type, ...) to make bps a very accurate comparison. But, I also feel that it should put you 'in the ballpark'. When I was running my CO2 at 24/7 (about a month ago), I typically had to run at 80 bpm to get my CO2 levels to 30+. However, prior to adjusting my spray bar to reduce some surface agitation I was closer to 130 bpm. So, if you're at ~60 bpm and you've got CO2 levels >50, that sounds almost too good to me.
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post #7 of 13 (permalink) Old 06-18-2005, 01:28 PM Thread Starter
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thanks all,

Yes I am at one bubble per second, or 60bpm 24/7 and with the above mentioned test values my CO2 seems to fluctuate between 35 - 45 ppm. So all of your responses seem to concur. There is 0 as in no surface agitation that I can see, unless an open top promotes CO2 loss?
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post #8 of 13 (permalink) Old 06-18-2005, 03:38 PM
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I would assume an open top will allow the co2 to rise out better (or worse depending on your view). Since there is more airflow going across the water. My tank is the same way for my Paludarium. I am pretty sure I have to pump more into it than others would.

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post #9 of 13 (permalink) Old 06-19-2005, 02:30 PM
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When you guys (and girls) speak of CO2 levels in ppm, are you using a test kit to obtain that measure, or are you calculating it based on the pH/kH chart? I have seen a CO2 test kit around, but wasn't sure whether it was worth buying or not. My kH is low, I tried boosting it with a product called "Tank Hard", but once I hooked up CO2 it was from around 7.5 to 6.8 pretty rapidly, so I disconnected the CO2 for night time (didn't want to wake up to dead fish!).

Thanks,
Tina
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post #10 of 13 (permalink) Old 06-19-2005, 02:56 PM
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Quote:
Originally Posted by Spar
i assume you mean seconds? otherwise I am way off too
HEHE

They are REALLY BIG bubbles!!!
jB
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post #11 of 13 (permalink) Old 06-19-2005, 04:44 PM
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Talonstorm

I use the KH/PH chart. It will only work (the chart) if you do not use a ph buffing agent (like PH up - down etc).

If your water is soft (like mine, < 1 out of the tap) use baking soda to raise it., try to have it at least 3-4 degrees or else you will have problems with very low ph (crash ).

Jeff B
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29gallon - AH Supply 1X55w 5500K, 1X13w Red (Night) CP -- pressurized C02, milwaukee regulator, DIY inline C02 Reactor -- Rena XP1
----------------------------------------
Hygrophila polysperma 'Rosanervig'
Echinodorus Uruguayensis "Amazon Sword"
Bacopa monnieri "moneywort"
Cryptocoryne wendtii ''brown''
Cryptocoryne wendtii ''green''
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post #12 of 13 (permalink) Old 06-20-2005, 12:06 AM
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Well, the kH was only 2, so I added 1 tsp. baking soda. Now the kH is 4. The pH is only 6.5 though (Milwaukee pH meter). According to the pH/kH charts I have seen, that puts my CO2 dangerously high. What can I do abot this? I have a spray bar creating surface current, I also over-rode the timer of my air pump (set to be on during the dark cycle). Should I even be worried about this? Most of the fish are acting normally, there are a few hanging near the water surface, but I am not so sure this is very abnormal behavior for my guppies. The ember tetras, harliquin rasboras, cory cats, copper tetra, and at least half of the guppies are swimming around like nothing is wrong. Advice?

On the up side, I have my first pearling plant, a mat of riccia. OK, go ahead and laugh, but I was so excited to see those little O2 bubbles, hehe.

Thanks again,
Tina
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post #13 of 13 (permalink) Old 06-20-2005, 12:33 AM
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Red face

Talonstorm

KH of 4 and a ph of 6.5 gives you a C02 level of 38 ppm. Thats great. According to current thoughts by those in the know, you want to target around 30ppm. Your not at a dangerous level at all. Just monitor your fish for signs of stress. Unless you have some sensitive breeds I dont think they will show any stress signs at all.

Jeff B
Algae farmer Extraordinaire
-----------------------------------------------
29gallon - AH Supply 1X55w 5500K, 1X13w Red (Night) CP -- pressurized C02, milwaukee regulator, DIY inline C02 Reactor -- Rena XP1
----------------------------------------
Hygrophila polysperma 'Rosanervig'
Echinodorus Uruguayensis "Amazon Sword"
Bacopa monnieri "moneywort"
Cryptocoryne wendtii ''brown''
Cryptocoryne wendtii ''green''
Hygrophila Difformis “Water Wisteria”
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