Since most bettas have long flowy fins, they have a tendency to get themselves snagged on things when they swim by...
Also in their natural environment, bettas are hunters. They NEED to explore their environment to locate various insects and microorganisms. Any caves/houses/logs you provide for them, they'll generally will take an interest in & investigate. I find this sort of behavior fun to watch, but also disconcerting when I hear stories of how they end up injured or worse missing/trapped.
Since I just experienced the problem with one of my fish, I thought everyone else who's new to bettas might be able to benefit.
Here's a few accessories I've encountered that I determined weren't safe. (Keep in mind these decorations may work fine for other fish though.)
- The first row was an ornament that his previous owner used to decorate his oversized wine glass. Notice how the paint was flaking off? Not a good sign. After I tested his water, I gave away the rest.
- The 2nd row is just ornaments that I had sharp edges or the paint used on the ornament flaked off... I was planning to give the castle away, but I broke it by accident when I was tossing plastic drink containers into the recycling bin. The plastic plants were just hideous and had a ton of defects in addition to being sharp.
- The last row is the plastic lock rock kit from Penn Plax that one of the girls wedged themselves into. They make some of the worst decorations I've seen but most people buy their products because they're cheaper than most.
Top fin is the another brand that manufactures a lot of AQ decor that I've found to be problematic.
- Feel free to post PHOTOS or LINKS to any other decorations that you've had issues with.