Today while at the beach i picked up a handfull of small pebbles, no bigger then pennies, in the thoughts of putting them in with my betta, and maybe a few to my goldie tank. Since they came from the sea i wondered, so (bum bum bum bum!) i did some research on koko's about it. All i found was a topic on sea SHELLS, but none about Ocean (Sea) pebbles.
My question, is it safe to put them in after boiling/disinfecting them?