There is some seepage about the bulkhead in the bottom of my new acrylic 75. Fortunately the pipe does not have bends below the leak, so any drips go straight into the sump.
I supported the inside drain by fitting the overflow strainer at the top, square into the corner of the tank, so I wouldn't have this issue, but I was also hesitant to overtighten the bulkhead fitting. It's about 3" up in a hole and so I made a special wrench to re-tighten the thing. Otherwise I have to drain the tank enough to lift one end up 1".
I did manage to tighten the nut about a quarter turn with this wrench but I have to take down the valve and Union and I don't think the threads sealed up well when I screwed the valve back in.
I may have to take it down and add some more Teflon tape. Only have to drain about five gallons to do that.
Ultimately I may be upset that I didn't just glue this Plumbing right to the acrylic tank permanently. Glue the pipe to the bulkhead and the bulkhead to the bottom of the tank. Glue the top of the pipe to the top of the tank and add the strainer as an accessory with a union inside the tank itself.
Here's the tank being filled and you can see my extravagant and foolishly cantilevered drain assembly in the back corner.