It could be interesting to test the skimmer in a static environment like a bucket with a known volume and phosphate level and then check the phosphate level in the water over time. That would give you a measurable removal rate. You could also measure skimmate production and see how that relates to the phosphate level as it declines.
There would be some loss in efficiency as the phosphate level is reduced but at least you'd have some removal rates at various phosphate levels without having to measure the skimmate.
.1% per hour sure seems like a lot of skimmate. Do many people run systems that wet?
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Exodus 8:2
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Current Tank Info: 90 gallon, 2x maxspect R420R LED, 4 Ocellaris Clowns, Yellow Eye Kole Tang, Flame Angel, Foxface Rabbitfish, Banggai Cardinals, Azure Damsel, rock flower anemone, cleaner shrimp, serpent star
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