Crystal Blue Black Out - Gallon

CI Acid 9 CI Acid Yellow 23 FD and C Red 40 How do I apply Crystal Blue Black Out? Simply pour Crystal Blue colorant into your pondYou may also like Piranha Float PLUS Algae Magnet Cleaner - for Aquarium Glass & Acrylic - 4'x2' Cleaning Area - Woodgrain Finish - Aquatic Maintenance Black.