Having bred fish commercially and imported I can sympathise. The number of people who come around to find out what you are doing, talk for hours and buy little is astonishing. That is why after a very short time I did not sell fom home but only to shops and wholesalers. They don't want to know how you do it, only that you have it when they want it (which can also be a challenge) We used to supply shops with oxygen weed and tubifex but trust me it was secret squirel.