"Jonno" wrote in message
...
Thanks. Is it just any sort of hay?
Probably.
Something in the hay acts as an antifungal and is probably copied by the
chemical in(d)(s)ustry and sold at great cost.
Suspended solids are now able to get to cling together, and drop to the
bottom of the pond using alum.
That should clear ir mostly. Fairly cheap from a pool shop Sorry have no
other freeby for you.


Thanks for your help


Jen