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What one dose does
PARAMETER
1 ml / 100 L
Boron
+0.0453 ppm
To raise boron by 0.5 ppm in 100 L: 11 ml.
How it’s used
40 g/L x 0.1134 = 4.54 g/L B (solubility ~50 g/L at 20 C).
Cautions
• Borate counts as alkalinity in titration kits (RHF found borax-spiked water reading 4.2 meq/L vs 0.18 baseline): avoid borate-based 'buffers' for alkalinity.
• Natural seawater ~4.4 ppm B; test-driven only.
• Mixing boric acid + borax gives a near pH-neutral boron supplement.