I need help with my sump should I stay using filter floss on the top layer of the cups or should I replace the 1st cup with a filter sock(i’ve been hearing it was better). Or can I have a combination of filter floss for the first layer followed by cup 1 as a sock filter and the other cups as bio media and carbon.
If not, do I just keep it like the image
All advice would be helpful
(Picture below is not my tank, but it is how I have it currently)

If not, do I just keep it like the image
All advice would be helpful
(Picture below is not my tank, but it is how I have it currently)

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