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Hi,

Today I have build an ATS for my red sea reefer 350. To save sumpspace, I made a Bucket design that is placed above the sump.
The screen is 20x15 cm, flow 1000L per hour and one 23 W light.

I only feed one cube a day.
Current nitrate is 10 (was 50 3 weeks ago).
I did some big water changes to loper nitrate to 10.

The. Source of the nitrate problem was the top off water.
I solved this issue by adding a nitrate filter to my osmose system.
I have room for a second 23W lamp on the other Side of the screen.