Treatment with potash solution: 5 g of maize-cob ash (Potassium hydroxide) was dissolved into a solution at 5 g/l and used to soak duckweed for 24 hours following the method of Vadivel and Pugalenthi .
Blanching: Duckweed was boiled in water for 5 minutes at 100[degrees]C.
Sun-dried: Also some quantity of duckweed was sun-dried.
Figures 1-3 showed the changes that occurred with the effect of different treatments given to duckweed meal.
Table 4 shows the result of the proximate composition of the different duckweed meal.
The variation in the nutrients especially in crude protein of the duckweed with different treatment is emphasizing the effect of treatments on protein molecules.
The high mean weight gain observed in diet 5 (blanched duckweed + soybean) and diet 3 (soaked in potash + soybean) is an indication that the fish were able to utilize the diet than other treatments.
Fasakin  reported the loss of Proteins from duckweed plants through denaturation (heating process).
Most importantly, duckweed practically cost nothing as compared to the one hundred and sixty naira (N160) per module of soybean.
Thus, the search for cheaper sources of feed materials such as duckweed plants as alternatives to the conventional materials therefore stand.
There's a bias in agriculture that all the crops that could be discovered have been discovered," Stomp says, "but duckweed could be the first of the new, 21st century crops.
Cheng and Stomp are currently establishing a pilot-scale project to further investigate the best way to establish a large-scale system for growing duckweed on animal wastewater, and then harvesting and drying the duckweed.