OkBe sure to use plain, unpainted, unglazed ones.
Should I plug the bottoms on smooth it with sand paperI also use them in my tanks. Just make sure they're clean first.
I have heard of fish trying so swim through the holes in the bottom of them and getting stuck or scratched. None of mine have ever got stuck from doing this but I think my dojo loach got scratched by trying this. I've left them in though. It's his own stupidity lol but something to be aware of.
Ok thanks for the infoCovering the bottom would work but if you have big fish (that wouldn't even try to squeeze through) or very small fish (that would definitely fit through then you don't need to worry. I've had those pots in the tank for years and that one dojo is the only one dumb enough to have done it, my other dojo has never tried.