The makers of it specifically state it's a specially designed bacteria blend. The blend of bacteria is a trade secret that they have yet to disclose. When Vibrant first hit the market there was a lot of discussion on these forums with the makers and some folks specifically asked what the specific blend was and the makers of Vibrant did not want to disclose as it might impact their sales if someone else started marketing the same formula.
#1 i am sorry about "specially designed bacteria blend."
#2 I have PPB meter , i NEVER try to go close to Zero , wont make sense.
# 3 i NEVER got one dose, then ......RTN.
#4 Bac 7 is a better product.
# 5 I 'think you right "secret that they have yet to disclose" that the reason of RTN. lol.
#6 NOT sure what you try to grow, i got 99% SPS,