Water Hyacinth Yellowing: pH, Sun, or Fish Eating Roots

100-gal pond, hyacinths yellowing after month — three causes, check in order.

Diagnosis Checklist

1. pH too high: Hyacinths prefer 6.5–7.5. Your 7.5 = borderline. Test KH.
2. Insufficient sun: Need 6+ hrs direct. Shade = yellow.
3. Fish eating roots: Flip plant — roots should be 6"+ long. Short = goldfish snacking.

Fixes

• pH: Partial water changes, peat moss bag.
• Sun: Move pond or accept — hyacinths won't thrive.
• Roots: Protect with floating ring or accept loss.

Hyacinths are tough — but picky on pH, sun, and root safety. Check all three.