I've had my veiltail betta for a few months now. As soon as I got him I noticed that he loved to burrow in the gravel and swim through the plants in his tank. Unfortunately his fins look terrible as a result. They are constantly tattered but yesterday for the first time I noticed that he split his tail all they way up to his body. I removed everything sharp from his tank weeks ago(the only plants are bamboo and two mossballs) but it hasn't helped. Any suggestions?