Dead zones
Oxygen falls below the line life can hold on to, under a thermocline where surface aeration never reaches it.
Immediate, Significant, Scaled
Aquatic Prosperity Services
What you buy here is better water — outcomes written down for a named stretch of coast, then held there year round by a subscription that never stands down. There is no quiet month in a water column. Nobody buys a hull either: hulls, gas, crew, instruments and the whole risk of running them stay on our side of the line, and the institution that answers for that water reads the numbers as they land.
2 mg/L
The dissolved-oxygen line below which NOAA classes coastal water as hypoxic — the line we are hired to move
NOAA NCCOS
400+
Coastal dead zones counted worldwide, a total that had been roughly doubling every decade since the 1960s
Diaz & Rosenberg, Science, 2008
~50%
Share of global desalinated water produced by GCC states, holding under one percent of the world's population
World Bank, March 2024
What we sell
Better water, on subscription, held all year and written to your own column.
Every buyer asks the same thing before anything else, and it is the right question: what will our water be carrying when you have finished with it. The answer is a set of outcomes, agreed for a named service zone and written down before a system is deployed anywhere near it. That is the product. We do not sell the systems and we do not rent them out, so there is no asset to depreciate, no season of machine time to purchase, and nothing on your books but the result. The treatment stage, in full.
Programs, not projects. What is bought is a subscription, delivered by a licensed service operator, and it runs full-time inside the regulatory and operational parameters both sides signed off in advance. It does not lapse once the week everybody was worried about has passed. No two are alike either. A column moves, the politics around it move, and the economics of whoever is paying move faster than both — so a document written for a reef lagoon would be the wrong document in a port basin, even where the chemistry rhymes.
The reason for running it continuously is not diligence for its own sake. There is no month when nothing is arriving: nutrients keep coming off the land, heat keeps loading the column, and the organic burden left behind by the last event is the head start the next one gets. Stressors accumulate. A program that works every month is holding each of them down while it is still small, cheap and reversible, which is a different job from arriving once the accumulation has already produced something with a name and a press conference.
That is also the entire price argument, and any authority that has paid for an emergency knows its shape without being told. Response bought after a stressor has built is bought at the worst hour available: vessels and industrial gas at short notice, crews accredited in a hurry, a regulator asked to consent while a beach is shut, and a buyer with nothing left to negotiate with. Prevention is cheaper than cure, and on a coast the distance between the two is not small. A standing subscription is what makes this level of service purchasable at all, and it is there for whoever has the foresight to arrange it while the water is still behaving.
One misreading is worth killing here, because it has cost us meetings. Contained treatment does not mean water queues aboard while somebody signs for it. A SeaBreather-class hull is specified at roughly 5,000 gallons a minute — our figure, and one the calibration phase on your own water puts a measurement against — and at that rate nothing dwells anywhere. Contained describes the reaction: enclosed, instrumented, and running inside a reactor rather than loose in your bay.
Nor is any of it taken away. There is no storage on a hull, so your water is not gathered up, moved off and returned from somewhere more convenient; it is drawn through, worked on in motion, and put back into the water it left. The plant is the thing that moves here. The water is not. What a program leaves behind is better water in the place the bad water was.
So the assurance is not a certificate on a parcel of water. It is three things you can check. Inline instruments govern the pass as it happens and cut the oxidant without consulting anybody; the institution that already answers for that water holds the same live feeds our crew steers by; and under the service agreement you, or an agent you qualify, can put an active deployment on hold on any suspected infraction until the concern is cleared. A client who can stop the work does not need to be sold perfection.
There is a fourth thing, and it is the one procurement people go quiet at. A subscription is canceled on two grounds. Performance outside the spec that was agreed is the first, and the second is a client who has served the minimum period and is simply not satisfied — for any reason, and without having to prove one. Very little infrastructure gets sold on those terms. We write it that way because a service intended to run for years should have to keep earning the year it is in.
Off your side of the table: capital, procurement, crewing, an analytics stack, and the internal argument about which department owns a boat. Still on it: your own regulator, the land-use reform only policy can deliver, and the authority to halt a deployment. That is what Aquatic Prosperity as a Service comes to in a contract.
The work
Four things go wrong in coastal water, and they go wrong together.
A bay rarely has one problem. Heat drives stratification, stratification strips the oxygen, the oxygen deficit finishes what the bloom started, and the intake fouls while everyone is still arguing about the cause.
Harmful algal blooms
Bloom material arrives faster than a plant, a pen or a beach can be protected from it.
Thermal stress
Warm water holds less oxygen and stratifies harder, so heat sits upstream of most of the rest.
Contamination
Spills, ballast and contaminated discharge, where the duty is oxidation and life support rather than oxygen alone.
Oversight
The second copy of the record sits outside this company.
Engaged from the site read. Still engaged in year four, and still holding its own copy.
The question usually arrives in month two, in public, from somebody who works for neither of us: who checked? A body with its own standing on that coast is a better answer than a supplier whose renewal depends on the reply. So whoever already carries that water locally — a marine institute, a fisheries laboratory, an estuary program, a ministry's own scientists — comes in before the first hull moves, and their accountability for that coast outlives our contract on it.
What they hold is the live feed rather than a quarterly digest: the same water-quality numbers a crew steers by, arriving at the same moment. They are free to bring instruments we have never touched and data we cannot see.
Two parties end up holding the same record, month after month. Only one of them is paid to like what it says.
The systems
One license, one crew, and a list that stays open.
The treatment systems are intellectual property of our parent company, Sophia Delta. Alarivean licenses them and does the work — the vessels, the crews, the permits and the liability sit here, in our name and our jurisdiction. How many exist is not published. Some are held as trade secrets, and better ones keep arriving.
Systems include:
The hull, and the oxygen duty it runs. Dissolved oxygen returned to the layer that lost it.
Bloom water and the toxins in it, drawn in and broken down before the water goes straight back.
Oil spills, ballast and contaminated discharge, with oxygen life support around the incident.
Cooling, oxygenation and clarity for reefs and aquatic nurseries.
Lakes, lagoons, process water, cooling loops, desalination intakes and discharges.
Oxygenated irrigation for yield and water-use efficiency, including saline ground.
Dried lakebed, playa and contaminated ground, held down and treated in place.
On the record
Permit FLOA00062, and the trial Florida allowed.
Florida's Department of Environmental Protection issued permit FLOA00062 in September 2024, for a red tide mitigation field trial on a five-year window. It may be exercised only while live Karenia brevis stands above 100,000 cells per liter, so it is a permit that runs during the event it was written for and at no other time.
The Sarasota Bay Estuary Program and the nonprofit START each wrote the grant up on their own sites. The estuary program put technical support into the application and took no money for it. It wants to be holding the instruments when open-water evidence is produced, and we want the same arrangement.
A regulator with jurisdiction read the proposal and allowed a bounded trial. Open water is the next number, and a calibration phase on your own water is the work that produces it. Every document behind a program.
Ten minutes, no data pack
Name the coastline you have to answer for.
The coast, the sectors sitting on it, the months it fails, and the horizon you plan against. Back comes a staged assessment of that shoreline — the exposed sectors, the event history for those waters, where a calibration phase would sit, and a named program lead in writing before anything is contracted.