I used 26 lbs LR
in my 28gallon nano and 2 bags dry substrate over 2 week period and was lucky to have very little cycle. I believe, from what i've read, the more LR
you have quicker it will cycle. Correct me if I am wrong please.
Not sure about the whole live sand thing but I got a cupful from lfs
to seed bed.
Even if no one responds it turns into your own public journal.