At 8 weeks, the lower dose of multi-species probiotic (A1) improved growth rate, while both probiotic
types improved feed conversion rate compared to the control animals, at the lower dose of multi-species
(A1) and at the higher dose of mono-species (B2) probiotics. Body composition did not vary between
treatments. At 4 weeks, ACH50 activity was significantly higher infish fed higher dose of B probiotic