Cool brand name:P
Ok so old is going out and new must come in.
The planning part
Tank idea
152cmL x 82cmW x 55cmH water level at 50cm
a cool 600Ltrs to fill
10mm glass, max size we can get here.

Still going with the slim line overflow at the back and cover my back pane with the Formica sheet I always use.
Maybe drill a hole both sides of the overflow for the returns ( first want to get the rotary return before I do that)
will rim the bottom for the pressure.
According to the glass thickness calculator with a safety factor of 4. very safe on 50cm water level the 10mm should be strong enough, don't know if I must fit a rim or not, best when finished to fill and see
what do I miss???
I have no clue about Close loop systems and don't know where the LR will be lol
What I do have so long is the following
1x Extreem in sump Skimmer for 900ltrs
3x 150W MH casings
This tank is going to sit on a wooden cabinet like I'm doing most of my tanks.
any ideas before I order the glass
Already got the quote on the wood