Ph & Kh

[DEA]

by right
bubbling should have NOTHING to do with your kh
nor does kh affect the co2 in the water
think of kh as fixed, and pH then dependent on the co2 you're injecting

however
1 theory for why you see bubbling immediately after the addition of baking soda
plants can and do take in bicarbonate directly from the water
the plants suck it up and photosynthesis quickly
so quickly in fact they exhaust the other nutrients in the water which they need

try adding some fertiliser to your tank
and see what happens

[jacian]

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On 1/12/2002 11:52:22 PM

Any difference between baking soda and KH up powder in terms of effects on the tank water?

Is it cheaper to use baking soda? Any reason to use KH up instead of baking soda?

Thanks.
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Baking Soda is Sodium Bicarbonate, not sure what is in KH up powder.

KH up costs abt $7.00 for 150g while baking soda costs abt $1 per 100g. If you buy from Phoon Huat, can get 500g for abt $3 (can't remember).

If KH up powder is Potassium Bicarbonate, I may consider using it else Baking Soda would do the job.

[vinz]

What does it take to maintain the KH once its up? Does it take regular dosing or just replace according to water volume changed? Just want to know what it takes before I start.

Any guidelines for the amount of baking soda to use per volume of water per points raise desired?

Anything else to watch out for besides no more then 2 points raise per 24hrs?

Thanks.

[jacian]

It takes about 2g of baking soda to increase kH of 60 litres water by 1 degree.

Generally, with CO2 injection, you only need to replace according to the water changes. In cases where CO2 is limited, some plants are capable of using the carbon from the carbonate. This will cause the kh to drop.

[daniel]

David

Does that mean I do not need to check PH
if I know what is the KH?

Thxs

[Simon]

malaysian, u need to know yr both PH & KH... they r both linked together

[daniel]

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On 1/12/2002 1:28:05 AM

Malaysian

KH or carbonate hardness acts as a buffer for dissolved CO2......

A rough guide for CO2 rich water are

KH 3 = 6.3
KH 4 = 6.5
KH 5 = 6.7
KH 6 = 6.9
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David

Does that mean that I do not need to check PH if I know what the KH is?

Thx

[daniel]

Simon
noted
Thks for the prompt reply

[David]

hi Malaysian

sorry i missed your question....

hey you a penang person?....errh which part georgetown, julutong, or gulugor...me from gulugor side towards greenlane.