Respected All
Simple and practical material on biofloc development, especially for early larval stages of freshwater fishes. The procedure, for developing biofloc under freshwater, raw material required with step by step protocol. I just want to develop biofloc with C:N 15:1 and C:N:20:1. Further, in the mid of the culture, he to manage the ratios, with full carbon inputs.
Materials required for biofloc development
1.Culture tank (capacity 10000 liters, diameter 4 m height 1.3m) tarpaulin (650 GSM) or cement tank
2.Plastic jar 5 pcs. (Capacity 10 lit.)
3.Air pump (output capacity 100LPM) With accessories
4.Wave maker
5.Vit. B & C tab.
6.Dolomite
7.Raw salt (iodine free)
8.EDTA
9.Floating feed (30-32% CP)
10. Imhoff cone
11. Water testing kits (TAN, Nitrite, Nitrate, Iron & DO)
12. pH meter or pH paper
13. TDS meter
14. Thermometer
15. Balance
16. Probiotic
17. Molasses
How to prepare FCO ?
FCO preparation :
1.Step 1: Take 3 to 5 nos. of 10 L capacity cleaned jar with cap
Step 2: Add 8 liters boiled cooled tap water with 400g (5%) molasses and 400 g raw salt (Iodine free) each jar
Step 3: Add Vitamin B and C tab. 2 nos. each in each jar
Step 4: Closed the jars with cap and start aeration (one aerator pipe totally immersed into water and another pipe set on the top of the water level inside jar) Step 5: After continuous 1 to 2 hrs. aeration add 50 ml or 5 tsp probiotic in each jar
Step 6: Closed jar mouth and continuous for 7 days
Main culture tank preparation (10000 lit.)
Day 1: Take 10000 L water (up to 3 ft) in tank and start aeration
Day 2: Check iron, if present add 30 g EDTA and check the DO level (6-8 ppm)
´Day 3: continuous aeration
´Check water pH (7.5-7.8)
´Add dolomite 500-1kg
´Check TDS (1200-1500 ppm)
´Add 5 kg Raw salt at 10 am and 5 kg at 2.30 pm
´Add molasses 2 kg
´Add 5 L FCO
´Day 4: Add DORB 1kg
´Day 5-9: add 250 ml FCO plus 250g molasses every day and aeration continue
´Day 10: check floc volume (2-5 ml/l)
´Day 11: Selected healthy, graded fish seed should be released after quarantine processed over (5-7 days observed in hospital tank)
all the water parameters recorded day by day after testing.
if any thing required more mail me :[email protected]
Thanks, Samiran Patra, for giving the detail regarding the floc development.
I have red your answer It is so nice.
Could you giving also the detail regarding C/N ratio, controlling water quality, etc during fish culture in biofloc system? Any practical manual have you got?
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