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Old 04-30-2017, 11:33 PM
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Originally Posted by dino View Post
Both will raise ph but bicarb is much more efficient for alkalinity with less of a ph swing. If this was not the case then every pool would not use bicarb for alk
Bicarb temporarily lowers pH slightly because of the off-gassing of CO2 but then pH will go back up.

Carb doesn't have CO2 so it instantly raises pH slightly.

Neither raise pH as dramatically as Ca hydroxide (limewater aka kalk).

People don't normally dose a big enough dose to see much pH effect using carb or bicarb. On tanks with higher KH demands the use of carb will trend a slightly higher pH.

The pH effect in freshwater is much more dramatic than saltwater.
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Last edited by Myka; 04-30-2017 at 11:36 PM.
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Old 05-01-2017, 01:07 AM
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I was hoping you would chime in. So what do you use for alk?
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Old 05-01-2017, 02:41 AM
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I was hoping you would chime in. So what do you use for alk?
Bicarb in client tanks because some of them dose manually, so a smaller pH effect is better.

Carb in my own tank. I'm not dosing heavily enough to make any measurable difference in pH. The CO2 scrubber does have a +0.2 pH effect though.
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