(Greg Reid) wrote in message om...
Thanks very much for all of the helpful responses, folks. OK, I'll go
with 3/8 aluminum -- drilled and etched and bonded in place ASAP after
the etching.

Regards,
Greg

For my glass tank I brazed brass pipe fittings to a 2" x 4" steel
plate (20 gauge) that had a few holes punched in it, and bead blasted
the plate before bonding it it, glassing all around it. Hasn't leaked
in 8 years.

Dan