This is more out of curiosity than anything.
Ratchet's fins seem to be pretty stiff when compared to Moonshoes, Starscream or Mirage. For a crown tail, he has very little web reduction when compared to others, so might this be it?
It's not impeding his movement at all and he flares just fine, but I was wondering as to what might cause this.
He is a tail biter, so I know the ends are still growing back. His water is changed out 4 times a week (4 50% to take care of ammonia and dead plant matter on the bottom, he also bites if he's in a cup) and is between 79-80 consistently.
My water is fairly hard and high in calcium, so might this be a cause?