Introduction: This survey was done in order to use of different levels of the herbal supplement Digestrum P. A. P. in freshwater Angel fish (Pterophyllum scalare) fry and its effect on some growth performance; microbial Flore and morphology of the intestine.
Materials & Methods: 120 fries (1.2±0.4gr) were gathered in a Complete Randomize Design plan with 4 treatments fed on different levels of Digestrum (0, 1, 1.5 and 2 gr/kg in dried food) each with 3 replicates for 60 days.
Result: The results showed that Digestrum had positive effects on final body weight, SGR and FCR so that in the treatment fed on 2 gr/kg. The most final weight (6.8g±0.34), the best SGR (4.0±0.12) and the least FCR (1.1±0.22) were observed in the same treatment (p<0.05). The most number of Lactobacilli colonies, the best length of the intestinal villies (600.14±15.44), villi across (105.14±2.18), and cript depth (55.2±2.10) were reported from this treatment too (p<0.05).
Conclusion: Based on the results, it could be concluded that the herbal supplement Digestrum P. A. P. can improve growth performance and intestinal bacterial flore in 2gr/kg level of dried diet.