Ouch! Your "Eureka!" emotional excitement is much, much more understandable now!
RTR: Long term plans for this fish Viktor will be a large heated Pond/Pool.
VJ: Planned or existing?
RTR: To be honest this is the most Tricky Pim I've ever kept. Very flighty & a fussy eater

Its only grown from 3" to 7" in approx a year which is an indication of how Im struggling to get things right for this splendid fish. Its causing me no end of frustration.
VJ: Shocking troubles. Sad but good to know in terms of my education. Try to take it easy, Rob. It's just a fish and we are all sure you are trying your best and know what you are doing.
RTR: I'm trying to keep it with very calm Tankmates so that it acts accordingly. However whenever one of the other Pims i.e. Lima Shovelnose approach it fly's off @ speed. Will consider moving this fish to another one of my setups to give it even more piece & quiet. With regards to feeding I will also try & implement some small whole fish into its diet as recommended.
VJ: I think in such a tough situation, the best/ideal decision is to have it alone in a tank if at all possible. It will address both the tank mate and feeding issues.
Post some pics please of the fish and its tank, if you will.