On Sat, 14 May 2005 20:30:33 -0400, "gunnar" wrote:

i have a new exterior filter with bio balls as last part of filter gravity
flow system. do i clean off the bio balls when i rinse out the pad filter?

I wouldn't unless they're covered with muck, in which case I'd get or make
a better pre-filter. Use pond water when cleaning them. ~ jan

~Power to the Porg, Flow On!~