225gal display with 100gal sump. I run a fresh cup of GFO each month in a BRS reverse flow reactor for phosphate. My PM Bullet 3 with an Iwaki 70 pump is rated for 400gal by the manufacturer and is perfectly capable at keeping Nitrate undetectable even with heavy feeding. Unfortunately though I do have to run a filter sock (for micro bubbles) on the outflow, it takes up a lot of space, makes a lot of noise and that pump draws a lot of electricity relative to modern pin wheel skimmers with similar ratings.
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