The Planted Tank Forum - View Single Post - Eheim 2217 filtration media layout
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post #2 of (permalink) Old 10-15-2020, 01:55 AM
Now3
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By "mech" I am going to assume you mean mechanical filtration (course sponge and fine filter). Yes, mechanical filtration will:

A. Keep your water column free of any free-floating particles and/or debris.
B. Keep debris from clogging up your biological filtration (bio media balls).

Honestly, I have never found "coarse" sponges to work really at all, but it depends on what you mean by "coarse". Your best bet would just be a medium sponge and a pad of fine filter floss.
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