Just like to say a big thank you to everyone on this great community. My tank has completely settled now with just one casualty, the smaller one of my two tiger oscars, had to go as it turned into some kind of football hooligan! After weeks of separating, reintroducing I decided on selling it, but on the plus side, arrowana looking great and eating everything, Ray growing fast and also eating great and Dave my big tiger Oscar is his usual grumpy self, plus my geophagus and three red hooks, peaceful great looking tank now, thanks again everyone for all the great tips and advice.