HI guys, I'm not incredibly new to fish keeping, but I still have a LOT to learn and retain. I've had fish pretty much my whole life. Over the last 5 years, I've been keeping a few cichlids in a 29 gallon tank. Over the weekend, my aunt and uncle gave me their 70 gallon bowfront drilled tank with the stand and filter canister they bought after my uncle got fed up with maintaining a sump tank (first photo). I'm super excited! This is going to be a big project for me, as I'm planning to build my own background. The tank needs to be cleaned thoroughly. The area that is drilled is rounded off with a plastic material (photo 2). My uncle told me that if I removed it, the tank will leak. Unless he told me not to remove the pipes. I can't remember now. I was thinking about using one of the pipes for the intake of the canister filter and using the other for the output, which I'm thinking about making it a waterfall into the water. That whole corner I'd really like to use to house a heater and CO2 supply line. So I'd REALLY like to remove this plastic wall. There was water being held in that corner until I drained most of it out. That's why I'm assuming it would be safe to remove it. Would the pressure of the water cause the glass to weaken? It would make sense that their is a barrier. And if I can remove it, how would I? It looks like some very sturdy glue was used (last photo).