Found a dosing calculator
Common dosing is 1mL/10gal of this solution daily or every other day.
Dose 5mL/10gal after water changes.
Many folks double or triple the daily dose as an algaecide.
Certain plants, such as Anacharis or Vallisneria sp., generally don't like glut.
Don't add any "Activator" or "Plus" bottle that may have come with your Glutaraldehyde source.
Glutaraldehyde is dangerous! Be careful, don't drink it, don't breathe it in, wash any skin contact, etc, etc.
thanks for the help =)