"WilsonKKW" wrote in message
...
I have heard of ponds that are with NO filter..any info folks?

Hi,
If you still have koi in 500 gallons, the answer is probably no, unless
water changes are something you enjoy.
Ponds with no filter, no pump, a few goldfish, plants and clear water year
round are possible. The secret is a FEW goldfish to keep it mosquito free
and minimal, if any feeding.
HTH -_- how
no NEWS is good