Table 5. Feed cost estimation for producing one ton biomass of striped catfish (Pangasius hypophthalmus) using kombucha diet supplementation
| Treatment | FCR | Total feed required (kg) | Feed price (IDR/kg) | Total feed price (IDR) | Total kombucha required (L) | Kombucha price (IDR/L) | Total kombucha price (IDR) | Total feed cost estimation (IDR) |
| PaKa | 1.98 | 1.980 | 13.000 | 25.740.000 | 0 | 70.000 | 0 | 25.740.000 |
| PaKb | 1.40 | 1.400 | 13.000 | 18.200.000 | 28 | 70.000 | 1.960.000 | 20.160.000 |
| PbKa | 1.34 | 1.340 | 22.000 | 29.480.000 | 0 | 70.000 | 0 | 29.480.000 |
| PbKb | 1.18 | 1.180 | 22.000 | 25.960.000 | 23.6 | 70.000 | 1.652.000 | 27.612.000 |
FCR, feed conversion ratio; IDR, Indonesian Rupiah; PaKa, low protein diet without kombucha; PaKb, low protein diet with kombucha; PbKa, high protein diet without kombucha; PbKb, high protein diet with kombucha.