about the hormones that could be true. What is the price of the fish, to see if it is worth for the seller to use expensive hormones to feed them!!!!
The use of hormones does not make any difference in the demands and prices of the fish but it does make a difference in their lifestyle like higher vulnerability to diseases and reduced lifespan. They will not usually tell you the fish has been fed with food laced with hormones but do ask your LFS for their sources. It must be noted that a lot of fish farms in Asia feed their fish with foods laced with hormones. I live in Asia myself and I had been swamped with complaints about this hormone regimen by my lfs before.