As much as I dislike this tank, I know others use it, so I thought I'd post a link to an article I found in the SPME Journals that has quite a bit of information on this tank:
https://archive.org/stream/journalofsociety50socirich#page/488/mode/2up
Open the PDF and go to pages 474 through 488
https://archive.org/stream/journalofsociety50socirich#page/488/mode/2up
Open the PDF and go to pages 474 through 488