Oto's prefer to be in groups of at least 3 as they are very sociable little fish so some more oto's would be good, although they are quite active fish yours should settle down a bit more over the comng weeks as it gets used to its new home .
He has settled down now and is happily sucking on a new plant [new to him, not to the tank!] I think it was just he's found out that the end he's stayed at since i put him in is now spotless [good work! ] and was just wondering what to do!
Tokis - I did have 3....if you notice my sig, 2 of them have died I don't think my tank was ready for them, as its only been set up 6/7 weeks. So learning from my mistakes, I won't be getting any more for a while.