Hi, I also run two aquaclear filters, a 30 and a 50. I got my sponges from Amazon, I don't know what kind you are using, but these really let the water through and I have to clean them once a week. If I don't I notice a reduction of water flow. If you are using these sponges, they are black and round, you can cut V shaped wholes into them as long as you know't go through to the intake. When you clean them, do not turn your filter off until you use a knee high, pull it up and around the sponge, then turn off the filter. This way it catches everything. Good luck!
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