On Thu, 24 May 2012 21:08:28 +0000 (UTC), "Arklin K."
wrote:

On Thu, 24 May 2012 16:34:46 -0400, Jim Elbrecht wrote:
Keep an eye open for a sand filter at a garage sale.

I wonder if it would work to just fill my 'bubble' with sand?
http://www.poolcenter.com/parts_filt...tem3_cartr.htm

Not likely-- When you get the sand filter you'll see how differently
it distributes the incoming water--- and has the multi -purpose valve
on top to backflush or bypass it.

Jim