CO2 Chart

GDominy · 02-04-2005, 11:38 PM

For quick and easy reference, here is a copy of Chucks CO2 Chart, easy to read.

Original Information credited to Chuck Gadd. Chart values used from:

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

masYPSI · 11-15-2006, 04:49 AM

How do you convert from degs, on the chart, to ppm, what i have.

Lycosa · 11-15-2006, 04:53 AM

Divide ppm by 17.8 to get degrees.

west9491 · 01-04-2007, 02:28 AM

you don't have to convert, skip the degrees part. Type in your pH, then skip the degrees box, type in your KH reading ppm in the box to the right. Then when you click on the degrees box, your reading of both your co2 concentration and KH reading converted to degrees should show, pretty neat, took me a while to fig. out.

but i'm running 16.6 w/ DIY co2, i have the stuff for a co 2 tank, just can't find a co2 tank that is ridiculously priced, any suggestions?

cbennett · 01-04-2007, 06:57 PM

just a note: most KH test kits give results in "mg/L" - that is the same as ppm.

leoslizards · 02-07-2007, 02:20 PM

Quote:

Originally Posted by cbennett

just a note: most KH test kits give results in "mg/L" - that is the same as ppm.

Yeah I was wondering the same thing. This has been very confusing to me. My test kit also give results in "mg/L" and I don't know how to measure that in ppm. For example my test kit says to add one drop of solution at a time until it turns a certain color and take the number of solution drops added and multiply it by 20 for GH and 10 for KH. My tests resulted in 11 drops of GH solution and 11 drops of KH solution, which I then multiplied.

11x20=220 GH
11x10=110 KH

The chart only goes to 15 KH Can someone please explain this to me? Thanks.

Hoppy · 02-07-2007, 06:50 PM

The chart is based on degrees KH, not KH in ppm or mg/liter. The conversion factor is 17.86 ppm per dKH. Your 110 KH = 6 dKH.

IceH2O · 02-07-2007, 07:19 PM

Goes to show these charts and caculators are worthless.

I don't inject CO2, I use Excel which won't translate into a CO2 reading.

According to the chart my CO2 level is almost 38 ppm.

We all know thats impossible. Most I could have is whats in the atmosphere, what is it 3-4 ppm?

Hoppy · 02-07-2007, 07:50 PM

The charts and calculators are not at all worthless. They are very good, but not for determining from the tank water KH and pH what the CO2 concentration is. If you use a drop checker, with distilled water having a known KH in it, the chart and calculator work extremely well. If you read carefully, Chuck Gadd notes in his discussion that the equation is not valid for water that isn't "perfect".

Glouglou · 05-15-2007, 12:28 AM

It’s for that some people prefer to use a drop checker solution, where you mix ph reagent and distill water that you bring to 4 or 5 dkh.

This way, no more guess...

4 dkh green at 30 ppm CO2
5 dkh green at 40 ppm CO2

cool

**plantbrain** · 05-15-2007, 02:35 AM

Oh, there is certainly guessing, but it's trying to figure out how long the reaction time and what color is what in the drop checker.

Still, vast improvement over other methods folks had been using and assuming about KH.

Regards,
Tom Barr

**BlueRam** · 05-15-2007, 04:49 PM

Quote:

Originally Posted by IceH2O

We all know thats impossible. Most I could have is whats in the atmosphere, what is it 3-4 ppm?

Atmosphere ~ 300 ppm (0.3%)
Water at equilibrium ~2-5 ppm.

Darth Sensei · 05-17-2007, 01:19 PM

According to that chart, my baseline CO2 levels are only 1.8. Is that possible?

My pH is 8.0 right now and 6 degrees KH.

IF this is correct, what ph should I shoot for? My calculation shows 6.8.

PLease help.

Rex Grigg · 05-17-2007, 01:33 PM

That is possible.

And you should shoot for a a drop in pH of one degree. So 6.8-7.0 is correct.

Steve Z · 08-07-2007, 03:18 AM

What does the Kh mean on Chuck's chart

11-15-2006, 04:49 AM	#2 (permalink)
masYPSI Algae Grower (View User Tanks) PTrader: (0) Join Date: Aug 2006 Location: Ypsilanti MI Posts: 98	How do you convert from degs, on the chart, to ppm, what i have. __________________ http://s184.photobucket.com/albums/x94/mas77indy/ 75g, 3-56w t5s (11hrs, 5hrs full light), 74degsF, PH 6.8, Eheim 2217, siolmaster select, 3 Otto's, 14 ghost shrimp, 4 Red Phantom, 4 Black Phantoms, 20 White Clouds, 2 julidochromis marlieri, 1 farowella, 5 martii swords, Rotala roundfolia, Rotala macrandra, Rotala goias, 2 Java Ferns, 1 Anubia 'nana, 3 crispus, 1 Amazon Sword (narrow), A bunch of Water Lettuce, Ludwiga Repens,

11-15-2006, 04:53 AM	#3 (permalink)
Lycosa Planted Member (View User Tanks) PTrader: (8) Join Date: Oct 2006 Location: Florida Posts: 214	Divide ppm by 17.8 to get degrees. __________________ On a cold, dark, and starry night in the U.P., if you sit very still....and listen very closely.....you'll freeze solid. I've moved so I figured I needed a sig change. On a hot, bright, and cloudless day in Florida, if you sit very still....and listen very closely.....you'll burst into flames. http://www.beckulture.com For all your Creepy Crawly Needs.

01-04-2007, 06:57 PM	#5 (permalink)
cbennett Planted Tank Enthusiast (View User Tanks) PTrader: (4) Join Date: Oct 2005 Location: San Jose, CA Posts: 783	just a note: most KH test kits give results in "mg/L" - that is the same as ppm. __________________ 60 gallon planted - Filstar Pimp #38 pressurized CO2 w/ ADA diffuser, 175 watts (10000K/6500K), XP3, 100% ADA Aquasoil Discus; Apisto. trifasciatas; cardinal, three-spot and red phantom tetras; BN plecos; golden, niger and zebra otocinclus 12 gallon eclipse planted Excel, 32 watts (6500K), gravel/laterite mix emerald eye rasbora, jellybean tetras, rasbora maculata, Corydoras habrosus, cherry and CRS shrimp

02-07-2007, 06:50 PM	#7 (permalink)
Hoppy Planted Tank Guru (View User Tanks) PTrader: (19) Join Date: Dec 2005 Location: Sacramento, CA Posts: 2,583	The chart is based on degrees KH, not KH in ppm or mg/liter. The conversion factor is 17.86 ppm per dKH. Your 110 KH = 6 dKH. __________________ Hoppy

02-07-2007, 07:19 PM	#8 (permalink)
IceH2O Planted Member (View User Tanks) PTrader: (8) Join Date: Sep 2006 Location: Rock Hill,SC Posts: 175	Goes to show these charts and caculators are worthless. I don't inject CO2, I use Excel which won't translate into a CO2 reading. According to the chart my CO2 level is almost 38 ppm. We all know thats impossible. Most I could have is whats in the atmosphere, what is it 3-4 ppm? __________________ My tanks: http://www.plantedtank.net/forums/ph...new-scape.html

01-04-2007, 02:28 AM	#4 (permalink)
west9491 Algae Grower (View User Tanks) PTrader: (0) Join Date: Jan 2007 Location: Oneida, TN Posts: 20	you don't have to convert, skip the degrees part. Type in your pH, then skip the degrees box, type in your KH reading ppm in the box to the right. Then when you click on the degrees box, your reading of both your co2 concentration and KH reading converted to degrees should show, pretty neat, took me a while to fig. out. but i'm running 16.6 w/ DIY co2, i have the stuff for a co 2 tank, just can't find a co2 tank that is ridiculously priced, any suggestions?

02-07-2007, 07:50 PM	#9 (permalink)
Hoppy Planted Tank Guru (View User Tanks) PTrader: (19) Join Date: Dec 2005 Location: Sacramento, CA Posts: 2,583	The charts and calculators are not at all worthless. They are very good, but not for determining from the tank water KH and pH what the CO2 concentration is. If you use a drop checker, with distilled water having a known KH in it, the chart and calculator work extremely well. If you read carefully, Chuck Gadd notes in his discussion that the equation is not valid for water that isn't "perfect". __________________ Hoppy

05-15-2007, 12:28 AM	#10 (permalink)
Glouglou Planted Member (View User Tanks) PTrader: (0) Join Date: Feb 2006 Location: Canada Posts: 214	And It’s for that some people prefer to use a drop checker solution, where you mix ph reagent and distill water that you bring to 4 or 5 dkh. This way, no more guess... 4 dkh green at 30 ppm CO2 5 dkh green at 40 ppm CO2 cool __________________ 33 gal, 100watt—neons T6—2 plant + 2 11,000k, Miro reflectors, CO2 pressurized, SoftWater Amazonian style, Peat and Ferts, Don’t tell me I howe my life to cyanobacteria! aaargh!

05-15-2007, 02:35 AM	#11 (permalink)
plantbrain Planted Tank Guru (View User Tanks) PTrader: (50) Join Date: Dec 2003 Location: The swamp Posts: 4,037	Oh, there is certainly guessing, but it's trying to figure out how long the reaction time and what color is what in the drop checker. Still, vast improvement over other methods folks had been using and assuming about KH. Regards, Tom Barr __________________ www.BarrReport.com >(///)> The monthly Aquatic Plant Horticulture journal

05-17-2007, 01:19 PM	#13 (permalink)
Darth Sensei Algae Grower (View User Tanks) PTrader: (2) Join Date: Apr 2007 Location: Grand Rapids, MI Posts: 82	According to that chart, my baseline CO2 levels are only 1.8. Is that possible? My pH is 8.0 right now and 6 degrees KH. IF this is correct, what ph should I shoot for? My calculation shows 6.8. PLease help.

05-17-2007, 01:33 PM	#14 (permalink)
Rex Grigg Planted Tank Guru (View User Tanks) PTrader: (65) Join Date: Dec 2002 Location: Portland Orygun Posts: 9,595	That is possible. And you should shoot for a a drop in pH of one degree. So 6.8-7.0 is correct. __________________ The Original Custom CO2 Regulator Dry Ferts Link to my Guide Purveyor of the Brutal Truth In Heaven We Were Formed... In Hell We Were Trained... On Earth We Were Released... United States Marine Corps!

08-07-2007, 03:18 AM	#15 (permalink)
Steve Z Algae Grower (View User Tanks) PTrader: (0) Join Date: Jul 2007 Location: Chariton ,IA Posts: 121	What does the Kh mean on Chuck's chart

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Advertisements
Get Rid of Advertisements