update
from reading around on the internet I'm beginning to think maybe my new tank is not big enough for Oscar in the long run (from what I'd read in an old Oscar keeping book, a 4ft tank would be ideal.....obviously opinions change over time) so considering giving him to a new home and maybe go down the Cichlid community or dwarf Cichlid community route
really unsure now as don't want to keep the Oscar in a tank that is ultimately not big enough for him
I have a few weeks until my new tank will finish its fishless cycle, so have some time to weigh-up the options