I noticed that my sump developed a leak after I installed the 2 overflow boxes. Not sure what caused it or where it really was but I decided it would be easier to replace the sump instead of a hit/miss repair job. Beacause the sump was 84" long, I knew had to cut it in half to get it out. The first step was to remove the water, pumps and filter mdeia from the old sump. I stored the media in a 29G with a power head to keep it fishy fresh
After removing the media, I went to work with the recip saw and cut the old sump in half. I had a little water spillage as you can see!
Once I got the old sump out it was time for the new one. I used 2-50G containers with a smaller container to hold the filter media. The water enters the small container, flows through the filter media and into the larger container. The larger container will hold about 6" of water, heaters, and the return pumps.
All installed and running. You can see the 2-50G containers are joined by a 1.5" pipe to equalize the water levels. This keeps one from running dry and the other from overflowing. I had to make a small wooden gasket of sorts to give the bulkheads something firm to bite into to get a good seal.