Brightness ( turbidity ) pool of gouramy.
Brightness also can be made as a(n) indicator fertility of pool media used to look after fish. Brightness which good to fish conducting business activity [is] 25 - 50 cm. Factor influencing brightness non coming from Mud, but plankton from result of needed to fertilization [is] fish food.
Source of R. Eko Prihartono, 2004.
