In a floater, you can fill it up with as many pucks as it can hold due to the design. It can be adjusted to show a certain number of pucks and have the water flow through that dialed in area and release a certain amount based on usage.
To lower your bromine, lift the cover and run the jets. Use the tub as eventually it will come down. No biggie and it won't hurt you.
Do not put bromine pucks in the filter area due to its low pH. Acidic water flowing directly into the pumps/heater is not a good idea.
Steve