I am making a DIY tank based on a 110 tall-48x18x30. I want to use an overflow and w/d sump instead of HOB filter. This is why I want to use acrylic for the bottom, so I can drill holes for the piping. I have heard that silicone will not hold to acrylic. Does anyone have experience with this? Any solutions? Do I just run a big fat bead and hope for the best, or can I scuff the acrylic for a better seal? Please help! Fish are getting bigger by the minute! Must increase tank size! Thanks in advance.