Alternatives: Table salt (NaCl) or granulated sugar (sucrose) follow the same method but with different saturation points.
Tap water contains minerals and chlorine that can make your crystals look cloudy or "dirty." Use distilled water for the most transparent results. diy crystals
For vibrant colors, liquid food coloring works well, but for a truly "electric" look, some DIYers use the ink from neon highlighters (which also makes the crystals glow under UV light!). Safety First While DIY crystals are generally safe, always remember: liquid food coloring works well