How easy to fix leak in tank

[Brighteyes_13]

ive decided to upgrade the system and fix the tank!

i bought a 90g from a local with a stand. i will transfer everything over,incl current 20g sump. empty the 60g, resilicone it, remove the overflow and plug the bulkhead, add a few chambers and make it into a sump/fuge setup.

right now the 90g is watertesting in the basement... the thing i should have done in the first place with the 60g.

thank you for all the input. and thanks for the offer kevin.