This should have been included earlier, sorry. I have a 72g heavily planted tank. The media flow in the filter is as follows: on the bottom I have the ceramic noodles, then the blue coarse pad, then the ceramic balls and at the top I use regular filter floss. The white stuff you pull apart and stuff in there. I do not use carbon and the fine filter pads seemed to fall apart quickly. I do a 20-50% pwc
weekely and I clean the filter as well, only replacing the filter fiber.
I purchased this filter in May of this year, the top o-ring is in good shape and the intake seal at the bottom is tight.