lvl 30 : fishing 424 Moon Carps and 307 Felinoy Roachs = 731 grey fish, time at least 21 second/fishing, so at least need 4 hours 15 minutes 51 seconds to finish it.
lvl 60: fishing 353 Twilight Amurs and 314 Silver Tenchs = 667 green fish, time at least 28 second/fishing, so at least need 5 hours 11 minutes 16 seconds to finish it.
from lvl 90, and i has created Diamond Dust = 1861 times(start), next to get lvl 120?
time is not included: failing to fishing/mining, connection problem, change location, got splinter, waiting for appearing of another fishs/stones, etc. :(