how about waiting? This fish looks like he is maximum 15cm/6in long. Keeping in mind that sooner or later he'll hit the 10 inch mark I wouldn't be worried.
how big is ur fh? judging by the change in kok size from the 1st pic to the last one its kok seems to be growing quite well and theres a some very visible pearling and red coloration....just feed it some colour and head enhancers if u can just look after it well and pretty soon ul own quite a looker