I'm a glass artist, and I just want to put it out there...
There are very few things that smell worse than grouting for a leaded window panel (or other various glass design using lead framing. That's right epoxy is like sweet tea compared to leaded grout!
Ingredients: turpentine, linseed oil (it is like a volatile acid made from plants!, (lead candium is sometimes used), plaster of Paris, whiting (will burn your skin as does linseed oil), black tar,aggregate, crushed limestone, sometimes other similar substances are used. Mix it all up in a bucket and have fun applying to your leaded glass. use in a well ventilated area, where a mask, and possibly use a fume trapper.
speaking of DIY: you can go buy a fletcher glass cutter (this is the most simplistic and cheapest on the market.) They can be found at Home Depot, Walmart, Lowes, Ben Franklins, Pini's, Ace, or any specific crafting/hobby or hardware store. They cost about 6 dollars. find some cheep glass sheets, or old windows (go for 1/8 inch thick)
take your measurements and make nice clean scores along the glass. take the glass over a hard but soft edge (like table with towel wrapped on it) and in a quick forceful downward thrust, break glass along the point of weakness (where your score was made) Then once you have your 3 dimensions you can start to assemble your tank/box/aquarium. Using an epoxy you can then assemble the sides to the bottom one at a time. Now that you have a glass cutter, you can make all the cuts you need on double poly carb, plexi glass, glass, and most other similar glass/plastic like glass types. No need for table saws or paying someone at hardware store to do it for you!
- Just my thoughts and suggestions