I had 2 bta's in my tank. I woke up one day and one was just missing. never been able to find it since. the second one went missing when I got a rodi unit and started using rodi to do water changes and top offs. I started out with just a 5 gallon water change the first 2 weeks. then I moved up to a 10 gallon water change. I have not been able to find either one now. I think the second one is hiding inside a rock. has this happened to anyone else? I would hate to tear down my tank just to find them...
