this is a 100 gallon tenecor acrylic tank and stand, nice design, bow in front. it has a overflow across the entire back of the tank that is a built in refuge/sump (second pic) and is drilled for a sump but has a plug in the hole that can be removed. bad part is the guy i got it off of scratched it up all over while attempting to clean it. it holds water with no leaks and the scratches are not as noticeable with water in it, but you can still see them. with some effort a lot of the scratches can be removed with a kit maybe all have not tried it. needs scrubbed as well. $150 obo