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Old 21-10-2015, 11:27 PM   #26
angelo
Senior Dragon
 
Join Date: Oct 2007
Posts: 3,515
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All my aquarium are without CC and OS. I only use sodium bicarbonate. Just take my 5 x 2.5 x 2.5 tank. I have aro, stingrays, pleco, catfishs, tigers and ...
I change water every two days, for every water change of 50% to 60%, I will add 5 teaspoons. pH maintain at 7.0.

CC, OS and sodium bicarbonate, They are just diff form of carbonate (KH). CC and OS contain calcium bicarbonate and disintegrate at diff rate.

Sodium bicarbonate, max pH 8.4
Calcium carbonate, max pH 9.4

By the way, is there any household getting NEWwater directly?
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