I have 2 rose buble tips, one is very small only 2 or 3 inches, the other is about 4 or 5. My question is why doe they look more like a long tenticle anemone then a bubble tip. they always look thing and stretched out. I have had the small one for about 8 months and the larger one about 4 months, so its not like they are new to the tank. What am I doing wrong?