Answers as above reply,
change your bottom fishing methods, go to other maps/waterways and fish for other species/types of fish,
it will help to improve/raise fishing skills.
So you created a reply on this forum, just to laugh at me?
I thank you for your helpful contribution to RF4.
Perhaps I should also mention, that if a kept fish is 6 hours old, it does not necessarily mean the angler has fished for 6 hours!