how to calculate c02 absortion? - The Planted Tank Forum
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post #1 of 16 (permalink) Old 04-05-2004, 10:24 PM Thread Starter
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i know i read somewhere how to do it, but cant find it....enlighten me please



thanks
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post #2 of 16 (permalink) Old 04-05-2004, 10:33 PM
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Quote:
Originally Posted by sirfishmaster
i know i read somewhere how to do it, but cant find it....enlighten me please



thanks
http://www.csd.net/~cgadd/aqua/art_plant_co2chart.htm

120g, Flourite & Sand. DIY Stand and Canopy. CF lighting 3wpg, Pressurized C02, DIY reactor. 2-XP3's, 500watt heater.
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post #3 of 16 (permalink) Old 04-05-2004, 11:13 PM
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Do you actually want all the math and chemistry jargon?
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post #4 of 16 (permalink) Old 04-05-2004, 11:20 PM Thread Starter
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no that kink helped, thats what i was looking for....but i add it up

ph=6.8
kh=232.70ppm

says my c02 is =1106.414 wow....is this high?
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post #5 of 16 (permalink) Old 04-05-2004, 11:23 PM
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Quote:
Originally Posted by sirfishmaster
no that kink helped, thats what i was looking for....but i add it up

ph=6.8
kh=232.70ppm

says my c02 is =1106.414 wow....is this high?
That is a Kh of @13 and a C02 concentration of 61ppm.... Seems very high.... Are you buffering your water with chemicals and what test kits are you using and how old are they....


Jason

120g, Flourite & Sand. DIY Stand and Canopy. CF lighting 3wpg, Pressurized C02, DIY reactor. 2-XP3's, 500watt heater.
Heavily planted
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post #6 of 16 (permalink) Old 04-05-2004, 11:26 PM Thread Starter
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no buffers at all, what did i do wrong on the calculations? my test kits are about 6 mos old.....



thanks
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post #7 of 16 (permalink) Old 04-05-2004, 11:30 PM
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Quote:
Originally Posted by sirfishmaster
no buffers at all, what did i do wrong on the calculations? my test kits are about 6 mos old.....



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You put the PPM reading in the degrees box when you ran the calculation... The reading is very high as really the max you want in a planted tank with fish is about 30ppm of C02.... Do you add C02???? if not your water company is probably adding something to the water to get such a false high reading...

Jason

120g, Flourite & Sand. DIY Stand and Canopy. CF lighting 3wpg, Pressurized C02, DIY reactor. 2-XP3's, 500watt heater.
Heavily planted
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post #8 of 16 (permalink) Old 04-06-2004, 12:07 AM Thread Starter
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no, i dont add c02, and this is a 40 gallon long...with 1 2ltr DIY c02.....lots of bubbles flying out consistantly...i had no other yeast so i used some that said 50% faster on it....maybe thats why....what are the reprecutions (sp) to high c02? if i add more plants...will this help?
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post #9 of 16 (permalink) Old 04-06-2004, 12:14 AM
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There is no reason to suspect that the your test kits are wrong or that the water company is putting chemicals in the water that mess up your readings. A KH of 13 is a very possible parameter. At my old residence the kh was 28 degrees. Its called "hard water." Somethimes those lucky softwater people cannot comprehend the extent that hard water can become...lol. :lol: .

Though it is just proper protocal to make sure that your test kit is accurate. I know that Aquarium Pharm are very accurate and have never read of a complaint. Make sure there aren't exessive phospates in the water...this leads to flase KH readings since phosphates are a buffer of a different nature themselves than carbonates.

Sirfishmaster, what you did wrong was put your KH which is in PPM in the field marked DEGREES. If you redo it correctly, the answer is 61 ppm CO2. That is quite high indeed. Of course you're injecting CO2 right? Make sure to correct the recipe or setting of a pressurized system.
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post #10 of 16 (permalink) Old 04-06-2004, 12:32 AM
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Quote:
Originally Posted by Rolo737
There is no reason to suspect that the your test kits are wrong or that the water company is putting chemicals in the water that mess up your readings. A KH of 13 is a very possible parameter. At my old residence the kh was 28 degrees. Its called "hard water." Somethimes those lucky softwater people cannot comprehend the extent that hard water can become...lol. :lol: .

.
My bad... There was never a mention of adding any C02 so one must assume that all other possiblities were exhausted to determine why the readings were low on the Ph and higher on the Kh.... I guess I mistook the question somewhere....
Sorry
jason

120g, Flourite & Sand. DIY Stand and Canopy. CF lighting 3wpg, Pressurized C02, DIY reactor. 2-XP3's, 500watt heater.
Heavily planted
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post #11 of 16 (permalink) Old 04-06-2004, 12:58 AM Thread Starter
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i dont know what i was thinking ops: i do add c02 but not extra, i seen this liquid c02 the other day and went on the assumption thats what you meant
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post #12 of 16 (permalink) Old 04-06-2004, 01:04 AM
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You have one heck of a DIY mixture there. One 2L bottle for a 40 gl tank with KH of 13 and still can bring down the pH to 6.8 :shock: Are you using the extra fast reaction yeast? Are those really that good compare to the regular one?
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post #13 of 16 (permalink) Old 04-06-2004, 01:41 AM Thread Starter
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the pack said 50% faster, i mix 1 teaspoon of yeast per 2 cups of sugar...lasts about 2 weeks...but i only had this stuff so instead of wasting it...i used it...and seems a little powerfull for my setup...i also notice tha the gas builds up in my canister...and really drops the water level in there. maybe the 2 together (co2 reactor & canister) are able to create more c02 absorbtion? should i point the spray bar up some to allow some escape of the c02?
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post #14 of 16 (permalink) Old 04-06-2004, 02:13 PM
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hmmm...bubbling CO2 into a canister with a top mount impeller could damage the motor.
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post #15 of 16 (permalink) Old 04-06-2004, 05:16 PM Thread Starter
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well i dont intentionally bubble the c02 in the canister, but my difuser spits out thousands of tiny bubbles at one end, then sails over the the other end and up the intake, after accumilation of bubbles creates an air pocket in the canister at the top....any body els with this problem?
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