old bricks would be a terracotta or clay base not cement.... post some pix but after a boil they will be fine

Bottomfeeder;2813796; said:idk if bricks are made of cement but cement is toxic to freshwater fish
No it isn't. The sudden shifts in TDS are (it is not really pH shifts that are dangerous, but sudden changes in Total Dissolved Solids screws with water pressure and the osmoregulation of the fish)Krylon "FUSION" has been used on all sorts of decor with excellent results...Ullopincrate;2824414; said:Any paint product that would be safe underwater?