hi Angelfish
i had to do the same to one of my tanks a couple of years ago.
i didnt have a dremel handy at the time so a trusty hot knife approach was used i never had any issues with leaks or it weakening the tank.
i think its just a trim anyway.
adam
Hi everyone ;)
Been keeping fish for 15 rs or more mainly tropical and Koi in garden pond.
moved onto Marine about 2 years ago started with a 90 litre tank and external canister filter.
had a few tank crashes but persevered.
Just upgraded to a sumped tank 50g display and 25g sump.
upgraded...