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I first proposed dispersing sewer sludge near the center of the Pacific Gyre as a means of producing an algae bloom to feed foraminiferae in 1982 (back when I still believed anthropogenic global warming was a real problem). The gyre currents being circular produces a region that has few nutrients; it is a biological desert. To produce the food for the diatoms that take the calcium carbonate to the bottom requires only fertilization. The circular currents would make containment of the effects tractable. It's farming from the bottom of the biological pyramid.

It is high time that the oceans be colonized and converted to private property. It may be the best way to save them from a global socialized commons.

I first proposed dispersing sewer sludge near the center of the Pacific Gyre as a means of producing an algae bloom to feed foraminiferae in 1982 (back when I still believed anthropogenic global warming was a real problem)

Though he didn't think about the climatic effects, Arthur C. Clarke beat you to it by a couple of decades in The Deep Range. Not with sewer sludge, but he proposed fertilization and phytoplankton farming to feed the whales... (and there's more to it if you haven't ever read it. Though dated, it's still surprisingly prescient.

I'm not sure if the Pacific Gyre would work as well as the Southern Ocean. The Southern Ocean has plenty of nitrate and phosphate, but not enough iron, which is why iron fertilization works there. The Pacific Gyre doesn't have any upwelling, so it doesn't have nitrate, phosphate or iron (it's a long way from any continents in the mid-Pacific). Though sewer sludge would provide some nitrate and phosphate, and you could enrich it with a little bit of iron, the vast size of that oceanic region means that the scale of the amount you'd have to ship out there is really large.

It is high time that the oceans be colonized and converted to private property. It may be the best way to save them from a global socialized commons.

I agree. These grant funded social scientists are playing at changing the climate to suit the political fashion of the day.
I have no doubt that the Earth will recover from any Woops! they create, but mankind might not survive to record the empirical datum.