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Warning for bicarbonate

 Date: Thu, 27 Dec 2001 16:23:22 -0000
 From: "George Booth" <gbooth at frii_com>
 Subject: Re: Warning for bicarbonate
 That's why the last sentence in that section says:
 "It is best to adjust the hardness slowly, using a test kit to measure the changes as you go along."
 I guess that wasn't clear.
 George Booth in Ft. Collins, CO (gbooth at frii dot com)

Thank you for your advice George and thank you all whom have answered off list as well!
Actually George, it doesn't say that on the page which was presented here on the list and that I followed to the page about water chemestry. Maybe such a sentence should be added? Please highlight it! For us that don't have english as native language, it is easy to miss things that stand out for others.
The link I followed: http://www.frii.com/~gbooth/AquaticConcepts/Articles/Water_Chemistry.htm
The paragraph:
"One teaspoon (about 6 grams) of sodium bicarbonate (NaHCO3) per 50 liters of water will increase KH by 4 degrees and will not increase general hardness. Two teaspoons (about 4 grams) of calcium carbonate (CaCO3) per 50 liters of water will increase both KH and GH by 4 degrees. Different proportions of each can be used to get the correct KH/GH balance dictated by the fish and plants in the tank. Since it is difficult to accurately measure small quantities of dry chemicals at home, a test kit should be used to verify the actual KH and GH that is achieved. "

I'm pleased to say that the PH is now 6.71 and no fish is floating. Although the discus isn't behaving like they usually do. They are all very dark in colour and standing in a corner, except one who is normal in colour and swimming around the rest of the tank. The PH went up to 6.96 before it begun to shrink again.
Once again, thank you  for your swift reply. It was appreciated!

Best regards
Greger Lindstrand