It does look a little long- but it looks like it is being worn down to me. I wouldn't worry too much so long as Alex has no problems eating, drinking or getting around. With the pumice style perches and lots of things to chew he should be able to look after it himself for the most part. Just keep and eye on it and see how it goes. If he ever looks like he's struggling to eat, drink or get around, then you'll need to take him to the vet.