> I use a sealer called "GOOP" for all sealing operations. By actual tests, >I have found it to be aquarium safe and long lasting. Is that "GOOP" one of the solvent type adhesives used for plastic? That's the only type I would use for acrylic. Silicone does not stick to it for long. Mark Binkley Columbus Ohio USA <))>< mbinkley at earthling_net