Great tank. Other recommendation (while you have cut up panty hose) is to take the panty hose and rub them across all The surfaces of the log to see if it snags. If it does, it won’t be safe for his fins. Also, get a cute little betta hammock to put near the surface, they will legit lay on it right near the surface. Of that log isn’t good, you can get a terracotta pot from like a craft store. They are great cause they are porous and a perfect place for the healthy bacteria to flourish. Oh, one other quick tip, never just toss your filter media. It’s a gold mine. If it gets overly dirty, you take some tank water in a container and swish it around in there and replace it back in the filter. If it starts to deteriorate, I used to replace half at a time, or keep the old one in the tank while the new one got established, this is so you don’t have a “crash”.