I have an established, cycled 20 gallon long tank. The filter contains: bio rings, filter polishing pad, carbon and filter foam. I'm setting up a 5 gallon tank from scratch. It will have shrimp and a snail or two. (very small bio load). I'd like to plant the 5 gallon and get the cycle going with seeded material. Do you think I should use the polishing pad in the 5 gallon to help the cycle *OR* do you think I could successfully swap the bio rings: putting the rings from the established tank into the new tank and putting new rings in the established tank? How harmful to the 20 gallon would it be to suddenly have the bio rings removed? Is there enough beneficial bacteria in the polishing pad, carbon and foam to keep the cycle? The 20 gallon also has sand substrate, plants and 3 large pitted rocks that would also have some bacteria.