Location of Experiment and Materials used: The experiment was conducted at CDIP (Center for Development Innovation and Practices) Ashulia branch at Doshaid village the peri-urban areas of Saver, near the capital city of Bangladesh (23.887729 North and, 90.302027 East) from 01 March 2019 to 30 June 2019. After selection of farmer and tank site different type of materials such as- plastic sac bags, plastic containers, trays, wires, pipes, water pumps, electrical instruments, nylon nets, tarpaulin, bamboos, gravels etc. were collected from „Savar Bazar? and suppliers.
Treatments of the investigation and design: The experiment was laid out in a Randomized Complete Block Design (RCBD) with one factor. The experiment was two treatments having three replications, three tanks were allocated for wish pond-aquaponics and another three for wish pond system.
Setting the wish pond: The wish pond was formed at the CDIP yard calculating 2.1 x 1.5 x 0.3 m3. The soil available from excavating pond was accumulated with some elements such as ½ kg urea, ½ kg tsp, ½ kg muriate of potash, ½ kg wheat flour and 1-liter molasses to improve the vegetable yield. Then the soil was occupied into the sac bags and located around the pond to have a resilient ridge. Subsequent to the sac bag arrangement at the pond adjacent, a tarpaulin and polythene lining were located internal to the pond to enable and rise water allotment capability. Some bamboo splits and the pillar were cast off to tie the bag to save in place and then water as a supplement.
Setup aquaponics system: Aquaponics setup was interrelated with three wish pond systems accessible with electricity and safety. Six food-grade plastic bottles (20 L) were recycled to assist the aquaponics vegetable manufacture. A twenty-watt aquarium filter pump was used to drive the water from the wish pond to the bottles where brick lets were recycled as grow bed and vegetable saplings were implanted.
Planting vegetable seedlings and stocking of fish: Various kinds of seasonal vegetables such as- Brinjal, Chilli and Mint were implanted in the sac bags. They were implanted both on the upper of the sac and alongside the sac by creation a small hole on the sac wall. In the aquaponics system, vegetable plants were implanted through the bricks and gravels. Tilapia (Oreochromis niloticus) juveniles were discharged at the ratio of 200 fish in a separate pond. Commercial floating pellet feed comprising 30% protein was provided to feed the fish twice daily. Feed was specified at the rate of 5% bodyweight of the fish.
Sampling and harvesting of fish and vegetables: Sampling of fish was done monthly. In every sampling, ten fishes were tested casually caught from the pond by using a fine mesh net. The length and weight of the fish were calculated and the data were noted on the computer. Vegetable harvesting was varied from plant to plant nature. Mint was harvested after 30 days of the plantation. Other vegetables were harvested between 40-60 days. Resulting in the harvesting procedure, their quantity and numbers were noted.
A sampling of water: Water samples were gathered from the fish pond in a ½ liter water bottle. The water samples were collected fourth throughout experimental time, first at the starting period, and another rest months of the experiment. After the collection of samples, they were brought to the Wazed Mia science research center at Jahangirnagar University for measuring total-N, electric conductivity (EC), hydrogen carbonate (HCO3), potassium(K), sulfur (S), sodium (Na) calcium (Ca) and phosphorus (P). Water temperature (o C), transparency (cm), dissolved oxygen (DO), ammonia nitrogen (NH3), nitrite nitrogen (NO2), nitrate-nitrogen (NO3), and total dissolved solids (TDS) were measured fourth nightly by used HANNA testing kit and miter without transparency. Transparency was measure by sickie disk.
Statistical analysis: Data noted for water quality, growth, and yield causative characters were collected and tabulated in proper form for statistical analyses. Analysis of variance was done following the RCBD design with the help of the MSTAT–C computer package programmer. Duncan's Multiple Range Test (DMRT) was performed for all the characters to test the differences between the means of the treatments.