Krylon Fushion paint has been proven aquarium safe by hobbyists...
Krylon Fushion's manufacturer states tht their product has not been tested on animals and they do not suggest it is potable safe...
This leads me to wonder how many other brands are actually aquarium safe despite not being labeled as such due to not being tested on animals...
Krylon Fushion may or may not adhere to glass...
Drylock is rated for potable use and can be colored with latex house paint pigments... I am not sure if Drylock adheres well to glass...