A prototype floating chamber was fabricated to measure GHGs in aquaculture ponds. The chamber, air sampling pump and tedlar bag were connected in series by silicon tubing with a three way valve, to control the circulation of flux and further flow into the tedlar bag. The GHG fluxes (changes in concentration with time) diffusing across the water-air interface was collected at different time intervals in tedlar bags and taken to the laboratory for analysis. The simultaneous analysis and quantification of GHGs (Carbon-di-oxie, methane & nitrous oxide) from the above matrices was done with single injection using multi-valve, ìECD, methanizer - FID combination detector. Pond water and slurry were taken directly into the headspace vials and analysed with the aid of headspace auto sampler in the GHG analyser.CH₄, CO₂ and N₂O concentration in tested ponds ranged from 1.25 - 3.92 ppm, 49-294 ppm and 233-295 ppb in water and 2.06-6.02 ppm, 302-2533ppm and 184-1012ppb in slurry, respectively.

A) GHGs collection chamber for aquaculture	B) Collection of gases from shrimp culture pond

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