https://www.youtube.com/watch?v=c7rJLQlZTY4
The old guides on this dont work anymore because chests take forever to respawn in an area. Going into another area usually doesnt fix it. If you open 5 or 6 chests within 3 minutes they stop spawning for a 5 to 10 minute period. Using this method you can get around that and get your hadium flakes done very quickly.
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Cool. Will have to try this out. I have yet to start my hadium flake farm.