Agri Kultuur January / January 2018 - Page 26

20 to 25 kg per m 3 . They will still grow bigger which will increase the biomass in the fish tank over time. The bacteria in the biofilter normally takes approximately 1 to 3 months to mature. This process can be kick started by inoculating the bacteria culture with commercial available products. After the stocking of the fish, the seedlings can be planted in the net pots. The lettuce seedlings normally take 4 weeks to reach a marketable size. It is very rewarding to harvest your own fresh leafy greens and you will get much satisf