Solution A may cause skin irritation and serious eye irritation.
IF IN EYES, rinse cautiously with water for several minutes.
Solution B and C is a highly flammable liquid and vapor. Keep away from heat, sparks, open flames, and hot surfaces. No smoking. Keep out of reach of children.
Nitrate testing When an aquarium has insufficient regions deprived of oxygen (= anaerobic zones) or denitrification proceeds incompletely then nitrate...