Thanks for the advice all , i think the back problem is down to excess protein early on . I didn't know enough about their diet & gave him to much prawn's, worm's , cricket's & high protein pellet's iv'e since got her a range of balanced pellet's veggy pellet's too , i did.t realise at first that she ate veg either so i think iv'e got her diet ok now & have got a repto 10 light in the tank now. I did buy a floating corner island that attached with magnet's but she's too big & just end's up floting free around the tank & she can't get on it then so i gave up & did the sand bank instead , i think trying to build her something to bask on might be the task .