is there anything i can add to a glass tank, like something to paint on or whatever, that will make the tank strong enough so that a mantis shrimp cant break the glass?
nope,
besides any small tanks u might use for a mantis shrimp are going to be inexpensive and the glass is going to be thin, i would look around a bit more for a acrlic tank? what happened to the one u were getting ?
i've been talking to the guy from blueboard.com. that site all about mantis shrimps. he said a 10 gallon tank isn't ideal. he said it's too small. ideally you want a 20 gallon or bigger.
just buy some plexiglass and glue it together presto u got your tank,
or look on the boards for someone that has a old sump they are selling cheap
or go into a big petstore some of those inexpenisve started kits are plexiglass and u will get a lid and lights also