If anyone is looking for sponge filters I have them for salel. The material is made of large pores so that you get a biological filter that is very efficient. Because of the large pores this is not to be used on fry tanks. They are 4"x4"x51/2" in size. What make these nice is that they the sponge is in 1" thick sections. Let's say you need to start a new filter quickly for those new Discus, just remove one section and place it on top of a new sponge for instant sponge filter. I alway use 3 sponges on top of each other because they a pretty high once stacked. Once the filter has cycled I can now move 1 piece to a new set and my filter is working fine with out the ammonia spikes that could kill your fish. I am selling them for $20.00 a pair with free shipping within the U.S
Outside the U.S you pay for actual shipping.
My Email address is Discusgeo2@netscape.net if anyone is interested
George
http://image1ex.villagephotos.com/pu...asp?id_=940468
