I messed up when I did mine now I want to re due it but I am just going to hold out, within the next year im getting a 200 gallon tank, but I only made my sump 2 sections instead of 3 because I wasn't sure how it was going to work out with doing it myself, but its been up for a year and never had any issues with it and was so easy to do just wish I made it 3 sections but I was tight for space because I have a carbon and a gfo reactor mounted under tank as well