Well my ato lifter crapped out they don't seem to last me more than 6 months so it is time to fast track my 90g build want to build a very custom sump for it out of plexe glass . Just wondering where people get there plexe glass from . The sump is going to be 5 or 6 chambers main tank inlet / filter socks / refug / skimmer / return and maybe and ATO chamber sump foot print is around 30" x 30"