I found this online for sale and going to look at it today. I have not plumbed a tank before. The person selling it does not know much about the tank. They said it’s a 90 gallon but the dimensions seams like it is a 120. My questions. There is a trim around the tank. Can I place this tank on a flat set face or does the trim need to hang over the edges? There are three holes drilled in the bottom. I can use these three holes to add a sump correct but why is there not an overflow do I need one or what kind of set up is it? On the second picture it looks like two of the holes are rather small or maybe just appears small is there a recommended hole size for this size of tank?



