A little bit fishy

G'day to evey one, I'm kinda new here. Well this is my first post. And wouldn't you know it , I'm seeking help.
I have a 6ft tank and the base plate is leaking. It's been repaired a few times but not by any one with knowledge. I'm thinking to replace the full length, or would it be ok to do a professional touch-up
I am happy to pay for a quality job.
Please any information would be muchly appreciateed. Oh and I'm N.O.R
Thank you for reading this :-)