So for anyone else daft enought to put a newt in their tropical tank, don't do it! I am hoping that my sister-in-law has finally learnt her lesson and will do her home work before she buys things in future.
In her defence thought the aquatic shop really shouldn't advise and sell newts to live in people tropical tank as this is obviously cruel to the newt and the other fish in the tank.
Typically when sis went back and spoke with the manager, he claimed that it was a work experience girl who advised her!
Newts and tropicals don't mix! In five days the amonia rose alarmingly in the tank, three guppies went missing (newt dinner?) and her fighter died.
So here endeth the saga.....only I actually quite liked him.....maybe when we move I might have a tank with one in!
as usual thanks for your advice!
sarah x