hey man first of all that is a damn nice flowerhorn
its breed will most probably be in super platinum magma / pure pearl cross faders
so when it will grow its pearls will be bright than the whole body and the KOK size will max out in about 1.6 years with proper feeding
"you can check my website 'aquatank boys' on google and can get 25 % off on every purchase"
'feeding guide'
try to feed him variety of food pellets like
1)hikari bio gold (not available in all shops in india')
2) optimal cichlids pellets
3)Okiko platinum pellets
4)dried shripms (most probably available in dried fish section in fish market in 'india')
5)blood worms
'Lifespan'
he will easily make it till 10-12 years on proper feeding and good water quality and dont worry about the KH, PH, nitrates.
Just 2 waterchanges per week and a 'good submerge filter and a overtop filter' will make it christmas for the fish every day