So I just got my first reef tank and it’s a fluval evo 13.5. I love the size as it fits perfectly on my nightstand and I get to fall asleep every night looking at a coral reef which imo is heaven. I’ve heard many people say that these nano tanks can be tricky as they can change water parameters quicker because of the tinier volume which makes sense. Well the baskets for chamber 1 and 2 are 120$ combined so instead of buying those I got to thinking. What if I built my own sump (which I have plenty of room for under my bed) out of a 20 gallon tank. It would definitely be overkill but it would add more water volume which would be the main reason I would be doing this. I was also thinking if I did that I could remove the back wall to the chambers creating an even bigger display area in the tank. So my questions are these 1: I know it’s possible to remove the back wall in the evo but would it somehow impede on the structural integrity of the tank? 2: I would drill holes for the input and output for the sump and I’ve never drilled holes in glass before but it looks pretty straightforward as I have machinery experience so has anyone ever had any problems drilling the holes in glass? 3: am I being crazy? Like I said before I know this is overkill but I found everything I need on Amazon to make the sump, the plumping, and everything else for a total of 130$ Minus the actually tank so the price is not an issue but is it crazy overkill? I just feel like if it were to keep the tank much more stable then it would be worth the money. Sorry for my long story/idea but does anyone have any input? Thanks!