I took what I thought were the two tanks that needed no silicon work at all... One Tetra and One Aqueon and began the leak testing.
I moved them from my shop/office/lab and took them to the covered sealed concrete patio back home. I'm using dense 3/4" Styrofoam beneath the tanks. Started filling with a garden hose.
20Lx2TanksFilling.jpg
I succeeded in filling them to within 1/2" to the top of the rim, which is probably more water than they will have in use.
20Lx2TanksSuccessfullyFilled.jpg
Decided to put barriers around them so that my two pet dogs won't drink the water, bother the tanks or cut themselves on the unfinished edges. I will leave these like this until next weekend. Probably run a filter in each to see if any micro vibrations cause issues. Then I'll clean them up really good with razor blades, acetone, Windex, etc...
20Lx2TanksRestingFullWithBarriers.jpg
I'm going to start the repairs on the cracked Aqueon and the Tetra with the loose corner this upcoming week. Holding off on de-rimming the remaining 3 Aqueons.