I have approx 2 pounds of HF beads on the very bottom in trays and then have a pound in the middle on the shelf in a nylon bag. I also have coffins filled with beads in each of the 4 drawers. Most likely overkill but I rather have too much than not enough. I actually get too much humidity here and every few months need to dry out my beads in the oven. I also need to run the cooler year round here in the lovely sunshine state.