Make sure that your flashpot has cooled down before reloading to prevent accidental ignition. Keep away from flammables. Fallout from flashpots can ignite other nearby objects. Use common sense when making this decision. Wear disposable plastic gloves, goggles and a breathing mask when handling chemicals.
Some chemicals can be unhealthy if inhaled.
Do not pour chemicals directly from the bottle into the flash pot. Instead, take a plastic spoon and transport needed chemicals to the pot. This way, if there is an accidental ignition you will reduce the chances of hurting yourself. Never use glass or metal utensils or storage devices. Make sure all spoons are made of plastic, and all chemical storage containers are either plastic or cardboard.