How to plug a hole in tank?
I am setting up my 120 gallon and I need your expertise advice. I will not be doing a sump so I need to plug the hole that was there before. I bought a fitting and it screws on perfectly but no matter how tight I turn it there is still some leakage when the water gets to that level. Any suggestion would help. Can i glue the fitting in? What glue is safe? Any other way to plug a hole? Glass? Etc.. I am all ears!!
I have enclosed the pictures of this setup, thanks