Pond Snails, Tadpoles, Freshwater Shrimps and some species of fish such as the Grass Carp. Most baby fish will also feed on algae in their early years.
Algae covered the top of the pond. The pond was full of algae.
Try Grass Carp
Yes, it is because without any algae some living animals in the pond would die. Algae can be food for some creatures in the pond. If your pond is just for admiring and not for living creatures, no, it isn't because the algae will take over the pond and no living creature is in it to eat the algae.
Snails and tadpoles
algae
A pond man.
you kill the algae
Tetra Pond Algae Control is effective in managing and preventing algae growth in ponds. It helps to control algae blooms and keep the water clear. Regular use can help maintain a healthy pond environment.
No
algae
No it will eat a bit of algae but it certainly won't be capable of cleaning the tank. The amount it eats will depend on how long it takes before the turtle kills/eats the algae eater.
The algae will reduce both air and light causing the organisms in the pond to die.