tank repair

Had this tank in by basement and wanted to reuse it and just now noticed this crack. so I am wondering if someone with more experience than me could tell me if I can sill use it or if I should just buy a new one.

I need any opinions and tips on the what to watch for during the process as well as types of silicone. Tank is a bottom drilled typical dimensions with corner overflow. I planned to just reseal but the previous owner started the process then abandoned. So I think it’s best to completely tear...

I have an Oceanic 140 gallon tank that has developed a very small leak in the upper right hand corner. I have narrowed the leak down to the top 10" of the tank. The back of the tank is glass and the bow front is not. The seams are all done with a black silicone like substance. Can anyone tell...