The 40 gallon tank should be sufficient for your one flowerhorn but of course the bigger the better.. yeah tank size matters.. if it's happy, it will pop out a kok..Joergemathew;3730429; said:what should i feed him by the way if it was kept in 2.5'1.5'1.5' tank can it have a good head or space too matters
Feed him good pellets in the process (hikari, chingmix, grandsumo, nls, XO, etc).. If possible get him some market prawns & cut into small pieces, they will love it.. & also bloodworms..