Not sure where you found that info but sodium hydroxide is lye. It may raise the pH in water but it will also kill any living thing.
Same with sulfuric acid. Not exactly a safe thing to add to your water.
Section 3 - COMPOSITION / INFORMATION ON INGREDIENTS
sodium carbonate: 10%-19%
It is baked baking soda (sodium carbonate) and water. Baking sodium bicarbonate (Arm & Hammer Baking Soda) in your oven at home drives off the extra carbon dioxide and it becomes sodium carbonate. This is something anyone can make themselves.