Dilemma facing aquatic pool：Alien species hazards
We find from the field of exploration and access to teachers during the current ecological pond there are several difficulties to be overcome and improvements, one of which is harmful alien species, the species is the main hazard apple snails.
Different sizes of apple snails
Palm-sized apple snails
Ecological pool quite waterborne plants, producing a lot of apple snails eggs
Apple snail eggs are also on the side of the pool wall
Dilemma facing aquatic pool：water quality issues
In addition to the hazards apple snails, and other aquatic plants is not easy to make the plight of reproductive success is water quality problems. Because the pool of water ecological wastewater from school, there is no fixed supplement clean water, with the water level regulating system is not complete, so the formation still not flowing waters, likely to cause water pollution.
Dirty pool water ecology, unseen bottom
Red-brown water show
After exposure, the water began to produce white foam
Pond surface covered with white foam, water turbidity
