So an update from Thursday on is in order.
Friday evening: I built a frame for the flood table.
Saturday evening: I played around with the sump and filters a bit getting them ready. I also tried filling the main pond only to find a pretty significant leak coming from the lower bulkhead. drained the pond and went home since no stores were open at 240 am to buy a 3" crescent wrench.
Sunday: Stopped at the hardware store and aquarium store for some filter material. tore down the frame for the flood table, had to remove the lower brace on the main ponds frame (so I could fit a wrench in that area. Generally a giant pain in the ass to turn a bulkhead 1/2". The crescent wrench I bought was ineffective so I eventually just started putting a screw driver on the flat parts of the bulkheads nut and tapping it with a hammer. it worked but, I really hope I never have to redo that section of plumbing.
Once that was done, it was 3 long slow hours without incident as water level in the main pond went to the second line and was just fine. Opened up the sump side to let the water equalize and test that bulk head, again, no issue. another two hours of pond filling and all was good.
Left to let the tanks rest and check their connections.
Monday: Get back to my warehouse all excited. Get into the fish room and see no leaks YAY!
Close both of the 1-1/4" valve connecting the two tanks so I could also test the 2" overflow and start filling up the sump the final 3"
Somehow, in opening/closing the 1-1/4" valve closest to the sump, I messed up the seal and it started weeping water at a rate of a drip per half hour. spent the rest of the day draining the ponds.
As I do not really have any desire to redo the entire section, I am planning on creating a vacuum in the line then applying primer and glue over the seam, using a PVC repair ring on the affected fitting and then cover the entire thing with marine epoxy. Will hopefully get some of that done this evening, depending on if I can make it to home depot after work