Cameron, With a sponge filter you will need a few little things - air supply via air pump(for one sponge filter it does not have to be of any size) You may need a air line valve to adjust air flow into your sponge filter. And some air tubing to get from your air supply to your filter. A suggestion may just to use a simply sponge filter, as I do carry them I'll sell large pore sponge filter with lift tubes for abtou 3.25 or so each. A "hydro" sponge will be less ecoonmical doing basically the same filtration. And the place whom carry's the sponge filters and air tubing is listed below my name:) Just my 2 cents. Mike Chappell TGA -------Three Guys Aquatics------ ------ www.threeguysaquatics.com ----- Mike Chappell- Owner info@threeguysaquatics.com -----Original Message----- From: owner-apisto@admin.listbox.com [mailto:owner-apisto@admin.listbox.com]On Behalf Of Cameron Case Sent: Sunday, September 23, 2001 2:58 PM To: apisto@listbox.com Subject: sponge filters I have two things. First, from anyone who knows, what size "Hydro" sponge filter would be good on a 20L w/ plants and (eventually) apistos (additionally, what else do I need other than a pump and some tubing)? Second, from the killi list, here is a place they claim has really good prices on sponge filters www.4fishstuff.com Thanks, Cameron _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp ------------------------------------------------------------------------- This is the apistogramma mailing list, apisto@listbox.com. For instructions on how to subscribe or unsubscribe or get help, email apisto-request@listbox.com. ------------------------------------------------------------------------- This is the apistogramma mailing list, apisto@listbox.com. For instructions on how to subscribe or unsubscribe or get help, email apisto-request@listbox.com.