So I got a castle for my betta, but within a couple of weeks, the paint started chipping off, so I took it out of the tank. I really like it, though, and so did my fish, so I didn't throw it away. I read somewhere that you can use silicone to coat unsafe decorations. Any suggestions on the best way to do this? Best place to get the right kind of Silicone at a good price? How to spread it evenly? etc...