Last year when I was frustrated with water turnover in a small pool, plus messing up my small patio home yard by backwashing, I ran across y_not who suggested using the duda diesel filter bags. Just clamp one over the discharge hose and point it back into the pool.
Since sand filters are typically 30-40 microns, the bag doesn't need to be really low micron. I figured that since lower micron bags cost about the same... why not go lower just because. On the other hand, I don't want to go too low and risk it filtering too slowly for a 1,600 gph pump and having it create too much back pressure and/or tearing, etc.
Have any of you used the bags for this purpose? Does it work well for filtering out all of the backwash gunk?