Determining KH and GH levels...

Brett_Fishman · 11-16-2005, 05:50 PM

I'm using a Hagen test kit and I need a bit of clarification...

According to the test kit:
GH is 40 mg/l
KH is 20 mg/l

My PH is 6.6

There is a conversion for KH from mg/l, what is it?

**Damon** · 11-16-2005, 05:53 PM

mg/l is ppm

DavidDoyle · 11-17-2005, 03:16 PM

GH and KH are measured in either degrees or ppm/mg/l. There are 17.9 ppm per degree. Your water is a soft 2.23 dg and your kh is just over 1. With such low kh keep an eye on your pH and dont add co2 w/o taking steps to raise your kh.

**Damon** · 11-17-2005, 03:43 PM

I know it was too good to last, Mr. Doyle. I thought the conversion rate was 17.1, not 17.9.

DavidDoyle · 11-17-2005, 04:29 PM

My numbers come right off the Aquarium Pharm gh/kh test kit instructions

Brett_Fishman · 11-17-2005, 07:37 PM

What suggestions do you have to raise KH? And then of course maintain it. You are right everytime I inject I have major PH fluctuation.

Brett_Fishman · 11-17-2005, 11:14 PM

how about baking soda?

http://dataguru.org/misc/aquarium/calKH.asp

mlefev · 11-18-2005, 02:05 AM

Ok now you've got me curious. My test kit instructions say to add drops until the water turns from x color to x color and everything reads in mg/l

My KH took 5 drops...
and my GH took 16 drops.

My pH has been steady at 8.0

Should I worry or leave it be?

Thanks in advance...I can't get back here too often,...school is killing me

**Damon** · 11-18-2005, 08:30 AM

Your Kh is fine. Your ph won't drop much by adding Co2. Not to the point where you will stress out fish. @ 30ppm CO2 you ph would likely drop to about 6.7. Thats a good range for most fish (maybe not african cichlids but they don't belong in planted tanks anyway).

11-16-2005, 05:50 PM	#1
Brett_Fishman Captain Highlander Join Date: Jun 2005 Location: Vancouver, Canada Age: 33 Posts: 45	Determining KH and GH levels... I'm using a Hagen test kit and I need a bit of clarification... According to the test kit: GH is 40 mg/l KH is 20 mg/l My PH is 6.6 There is a conversion for KH from mg/l, what is it? __________________ Freshwater fishing enthusiast ‘Fish Nerd’ – According to my girlfriend

11-16-2005, 05:53 PM	#2
Damon Aquatic Naturalist Join Date: Jan 2005 Location: Dayton, Ohio Age: 32 Posts: 14,982	mg/l is ppm __________________ For in much wisdom [is] much grief: and he that increaseth knowledge increaseth sorrow. Member of the AGA (Aquatic Gardner's Association) Member of the IBC (International Betta Congress)

11-17-2005, 03:43 PM	#4
Damon Aquatic Naturalist Join Date: Jan 2005 Location: Dayton, Ohio Age: 32 Posts: 14,982	I know it was too good to last, Mr. Doyle. I thought the conversion rate was 17.1, not 17.9. __________________ For in much wisdom [is] much grief: and he that increaseth knowledge increaseth sorrow. Member of the AGA (Aquatic Gardner's Association) Member of the IBC (International Betta Congress)

11-17-2005, 07:37 PM	#6
Brett_Fishman Captain Highlander Join Date: Jun 2005 Location: Vancouver, Canada Age: 33 Posts: 45	What suggestions do you have to raise KH? And then of course maintain it. You are right everytime I inject I have major PH fluctuation. __________________ Freshwater fishing enthusiast ‘Fish Nerd’ – According to my girlfriend

11-17-2005, 11:14 PM	#7
Brett_Fishman Captain Highlander Join Date: Jun 2005 Location: Vancouver, Canada Age: 33 Posts: 45	how about baking soda? http://dataguru.org/misc/aquarium/calKH.asp __________________ Freshwater fishing enthusiast ‘Fish Nerd’ – According to my girlfriend

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11-17-2005, 03:16 PM	#3
DavidDoyle Senior Member Join Date: Jan 2005 Age: 89 Posts: 497	GH and KH are measured in either degrees or ppm/mg/l. There are 17.9 ppm per degree. Your water is a soft 2.23 dg and your kh is just over 1. With such low kh keep an eye on your pH and dont add co2 w/o taking steps to raise your kh.

11-17-2005, 04:29 PM	#5
DavidDoyle Senior Member Join Date: Jan 2005 Age: 89 Posts: 497	My numbers come right off the Aquarium Pharm gh/kh test kit instructions

11-18-2005, 02:05 AM	#8
mlefev Senior Member Join Date: Apr 2005 Location: California Age: 26 Posts: 817	Ok now you've got me curious. My test kit instructions say to add drops until the water turns from x color to x color and everything reads in mg/l My KH took 5 drops... and my GH took 16 drops. My pH has been steady at 8.0 Should I worry or leave it be? Thanks in advance...I can't get back here too often,...school is killing me __________________ Well rounded fun and discussions available at Lots of Fun 10 gal 3 zebra danios 2 solid orange platies 1 clown pleco Too many stinking pond snails to count...miserable things.

11-18-2005, 08:30 AM	#9
Damon Aquatic Naturalist Join Date: Jan 2005 Location: Dayton, Ohio Age: 32 Posts: 14,982	Your Kh is fine. Your ph won't drop much by adding Co2. Not to the point where you will stress out fish. @ 30ppm CO2 you ph would likely drop to about 6.7. Thats a good range for most fish (maybe not african cichlids but they don't belong in planted tanks anyway). __________________ For in much wisdom [is] much grief: and he that increaseth knowledge increaseth sorrow. Member of the AGA (Aquatic Gardner's Association) Member of the IBC (International Betta Congress)

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