Great advice bgarthe!
I agree - by far the best bottled BB on the market appear to be: Fritz Zyme 7, Fritz TurboStart, Fritz Zyme 360, Seachem Stability, Tetra SafeStart, or Tetra SafeStart Plus, containing both nitrobacter (nitrite, NO⁻₂, to nitrate, NO⁻₃,) and nitrosomonas (ammonia /...