You can use pots too if you think you can finish in 3 minutes ( costs a lot less acric seaweeds and growth saps )
Chest counts too when you’re opening the same chest, so if you cant find the chests just wait till chest regen at ship and go open it
ofc you can fish while waiting for chests
Acric seaweeds are easy to get when you’re doing a sea chart, so i suggest using waterbreath 5 pots and 3 or less revealing pots.
With that two, you can clear 5 charts