To eradicate predatory and weed fishes from the pond suitable fish toxicant is required. Those are:
| Rotenone |  |
| Bleaching Powder |  |
| Phostoxin tablets |  |
However, it is always advisable to dewater and dry the pond than poisoning the pond.
To disinfect the pond and to maintain better pond environment, need lime.
For killing aquatic insects and larger size zooplankton suitable soft insecticide like Dipterex/Sumithion, etc. are also required.
To disinfect the seed also need certain therapeutant like Potassium permanganate, salt, etc.
