I have kept and bred many Tangs in our local water with no buffering.
That being said I have had luck triggering some tangs to spawn by adding salt
Are you looking to be involved or commited
A Pig and a Chicken are walking down the road. The Chicken says, "Pig, I was thinking we should open a restaurant!". Pig replies, "What would we call it?". The Chicken responds, "How about ham-n-eggs?" The Pig thinks for a moment and says, No thanks. I'd be committed, but you'd only be involved.