Review on Ceramic Hideout for Fishes and Shrimps: Saim Aquarium Decoration Ornaments for Optimal Breeding and Hiding Spots by Lori Chantland

I have had trouble finding a very smooth coat, many claim it is safe for a Betta but if you feel it inside and sometimes even outside you will find many sharp or find rough spots that can damage their delicate fins. This felt a bit rough (which I expected given its nature) so we just sanded it lightly and quickly, in less than five minutes, after which it was perfectly smooth. Now I love the feel, I love the look and how big the top hole is.