How big and thick are the pieces?
To be honest, you don't need to route the edges before assembly. I've built several small tanks and sumps as large as 120 gallons without routing.
The most important part is having straight and square edges, which means the pieces need to be cut on a good table saw with a good blade. If you can't find someone to route the edges for you, you can use a long flat file, at least 16"+. Clamp the acrylic piece if you can so it won't move. Place the file flat on the edge and file it several times. You don't need to overdo it. Just try to knock down some of the rougher saw marks. Doing it too many times will end up with an edge that's not square. HTH. Good luck.