Ok so my sump drama is I cannot cram 200 gallons of tanks into the space I had allocated for the sump.
So, I am ditching my 2 sumps and will have to build a single 210 gallon plywood sump (65x32x24) and get some pond armor here to seal the thing before I can complete the final testing.
I still have some scrap 3/4" ply so it will be a frameless 3/4" plywood tank using the garf method of screws every inch in the edges of the plywood and glued, with two 2x4 braces for the top and other seperator panels inside the sump for chambers. Then I will coat the inside with pond armor and by the time it fully cures I should be ready.