Hi Wrag;
Borax is used to raise the pH, or to create a borate residual > 50 ppm, which makes your pool somewhat resistant to algae, and tends to make it 'sparkle' more, apparently by modifying the refractive index of water slightly.
Baking soda is used to raise alkalinity -- it's EXACTLY the same chemical as is sold by pool stores as "Alkalinity Increaser"
If you would, please post your pool info -- it helps us keep give better info.Pool Chart Entry Form
Pool Chart Results

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