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Building Freshwater Sump

The MFK's DIY section! Enjoy with a PBR ASAP.

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Post Wed Aug 18, 2021 11:20 am
Bob1 Level 6 Member
Level 6 Member

Posts: 604
Location: Farmington
The first section would be for mechanical filtration, the question should I have the glass on the bottom be a few inches from the bottom of tank or sitting on the bottom of the tank? It doesn’t seem right to me that you would have the sock filter sitting in the water and then going into the biological filter.

Input needed!

Post Thu Aug 26, 2021 11:17 am
Passionfish Level 20 Member
Level 20 Member

Posts: 12302
Location: apple valley, mn
Bio filter needs to be exposed to air and water when sump is operational.
Mechanical filtration needs to be in water path to remove any solid debris/waste.
The bio filter should not require cleaning whereas the mechanical filter may need to be removed for cleaning rarely
Lastly, evaporation can bring water level below return pump. This can lead to pump damage.
Like a complete unknown


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