Can you meet in Manhattan Saturday?I have C.Prolifera for over a year.The grape and some other Caulerpa species will go( A )sexual ,i would stay away from the grape,feather,saw blade and the cup.
As stated above Caulerpa will spawn in your tank.On the other hand most people use C.prolifera and Cheato to reduce nitrate build up.C.prolifera is the long leafy one that is often seen at the LFS.There is mixed reviews about C.prolifera because some people say it will go (A) sexual some say it don't.I think there are different species
that look alike .That been said the one i have might not be C.prolifera ,how knows?What i do know is ,i had it for little over a year, it reduces nitrates in my system and it haven't spawned in my tank yet. LMK if you what some i'll be going to M.Aquarium tomorrow.