So this might be a totally useless DIY for y'all, but it's what I had on hand, so here goes.
I'm getting a new tank sometime in the next couple of months, but I wanted to start collecting and growing moss now. If this works (ie, hold water) I may also use it as a quarantine tank.
The reason I'm using a trophy/football case is I found it in my garage and wanted to use it rather than throw it away.
It looks like this:
And it comes in two interlocking pieces, like this:
Step 1: Determine which side will be on top, and separate it. These u-shaped panels came from a mold, so there were no seams to just strip and pull apart. To get past this, I took my drill and made tiny holes along the edge. Once I drilled the holes (forgot to take a pic), the lid portion snapped off cleanly.
Step 2: Clean up the rough/sharp edges. I don't care that much about looks for this project, so I just used a torch to melt the edges until all the sharp bits were gone. You could also use a file, if you wanted a nicer edge.
Tomorrow, I'll seal the other edges with silicone to make the case/tank watertight.
Thanks for reading!