LOL, yes you the man Frank.
Vitachem is great to use as a supplement on fresh/frozen, if fresh/frozen is the main staple of the fishes diet. I used it when feeding mussels to a puffer that I once owned. But if someone is already feeding high quality pellets even 3-4 times a week, there's really no reason to add Vitachem to the mix.
I am not against feeding frozen to fish, I'm just not a big fan of feeding farmed tilapia fillet.
What other frozen fish would you recommend ?
Sorry for breaking your chops Neil you by now I never get bored with picking your brain.