Hi as you notice the pond ...

Hi
as you notice the pond was OK till it was over loaded

i recommand you to keep it simple by addining a additional volume and considering cleaning the sludge from the current pond.

solid separation in front, and aerobic pond at the end may help

Israel has a pond system in many places, that work perfectly

you are welcome to contact me for ferther information
 

Ilan - ilan@enviro-eng.co.il