I bought 2 Marineland 29 gal
starter kits to use as nursery tanks. Each came with a Penguin 200 filter. The plan was to use a sponge from a sponge filter as a pre-filter to keep the fry out. The intake tube is rectangular and the sponges I bought won't fit.
Can anyone please suggest a sponge that will fit a 9/16" x 3/4" rectangular shaft. No problem cutting the sponge hole to make it fit. JustI can't tell by looking at the specs and it's a long drive to try to find one. I need to get them online.