Tilapia fish in a tank measuring 3 meters long x 1.5 meters wide and 1.2 meters high were infected by parasites. The recommended drug is methylene blue with a dose of 5 ppm in 1 meter of water. Calculate the volume of water and the amount of medicine needed. Discuss five factors that need to be considered before treating fish and suggest five ways to dispose of dead fish to prevent a second infection.