You can dispense magnesium sulphate, magnesium chloride, sodium (agricultural salt grade 12), sodium bicarbonate or bloat material (when bloat conditions are not critical), and trace elements.
Note –sodium bicarbonate or bloat material MUST NOT be combined with any other salts or magnesium in the container. If combined in the same dispenser a thick gel will result, blocking the outlets. This is stated clearly in the instructions.