[medicineman]

@SCMurphy
Thanks for the reminder and information, I will let the team know to order a taller glass for me to set on a single pane style. The reason why they insist still on using groove style perhaps due to their experiences installing huge pane of window glass which never experience huge water pressure.
The single sided silicone style is what they use in even bigger tanks in my country (private tanks). The problem is it seems nobody give me a good reason/answer to why the set it up that way. Either are ignorant that they just copy from similar large tank without knowing the purpose OR they decided to play stupid and let see what bad thing happens to me if I set the glass wrongly.

@CardBoardBoxProcessor,
Yes, a lot of work just for 700 gallon if you see it as a regular tank. This style of tank requires more work than regular 4 sided glass/acrilic tank. It is a sunken garden after all, with real plants all the way to the top and not to forget it is built integrated with the house right by the living room, so everything must be done correct. NO bigger displacement tank for me now, I can imagine the pain of maintenance....

@esarkipato,
It is 3 sided and now I decided to install it on a single pane (no groove).

@nornicle,
Thanks... perhaps you consider me as a dreamer. There is a limit to this building big stuff because I maintain the system personally (and limited free time will dictate it all).