Effective methods to remove green algae from plastic water tanks

How do you remove green algae from a plastic water tank? Is there a good method? Thanks!
--------------------------------------
Please check the relevant 2008 issues of China Poultry.
--------------------------------------
Shade it from the sun and clean it regularly. I don't have any other way.
--------------------------------------
Change the pH of the water. Add alkali for large pigs and acid for small pigs.
--------------------------------------
Learned something. Support...
--------------------------------------
Try a biological method. Keep a few loaches in the water tank. I tried it in the water trough in the cattle shed, and it worked very well.
--------------------------------------
Just scrub it, isn't that enough? What a hassle.
--------------------------------------
Scrubbing is such a hassle. Does anyone have a better way?
--------------------------------------
Shading from the sun is the only way, right? You can rinse it with hot water.
--------------------------------------
How big is the water tank? How much trouble can it be?
--------------------------------------
Soak it in disinfectant after a while.
--------------------------------------
You'd better disinfect and clean it properly. How big is the water tank