Process for controlling the concentration of dissolved oxygen within a specified open body of water

1. A process for maintaining fish in a cage in an open body of water, the process comprising: restricting movement of water into and out of a part of the cage, forming a portion of water within the part of the cage; and injecting oxygenated water produced by an inline saturator into the portion of water to raise a dissolved oxygen level and to lower a dissolved nitrogen gas level therein, wherein the oxygenated water is injected into the portion of water via a distribution device, the distribution device comprises a rotating supply pipe configured to circumferentially rotate during the injection of the oxygenated water to thereby rotationally inject the oxygenated water from the distribution device into the portion of water and encourage dispersion of the oxygenated water therein; wherein the process comprises monitoring the dissolved oxygen level in the portion of water, and performing the restricting and injecting when the monitored dissolved oxygen level falls below a predetermined level.

2. The process of claim 1 , wherein the inline saturator dissolves oxygen into a stream of water from the body of water and removes nitrogen from the stream of water, producing the oxygenated water for injection.

3. The process of claim 2 , further comprising monitoring the dissolved oxygen level immediately outside of the portion of water, and performing the restricting and injecting when the dissolved oxygen level immediately outside the portion of water and the dissolved oxygen level in the portion of water fall below the predetermined level.

4. The process of claim 3 , further comprising ceasing the restricting and injecting when the dissolved oxygen level immediately outside the portion of water rises above the predetermined level.

5. The process of claim 1 , wherein the dissolved oxygen level is raised to above 70 percent saturation.

6. The process of claim 5 , wherein the dissolved oxygen level is raised to at least 100 percent saturation.

7. The process of claim 6 , wherein the movement of water is restricted by a tarp or skirt enclosing the part of the cage.

8. A process for treating fish in a cage in an open body of water, the process comprising: restricting movement of water into and out of a part of the cage, forming a portion of water within the part of the cage; injecting oxygenated water produced by an inline saturator into the portion of water to raise a dissolved oxygen level and to lower a dissolved nitrogen gas level therein, wherein the oxygenated water is injected into the portion of water via a distribution device, the distribution device comprises a rotating supply pipe configured to circumferentially rotate during the injection of the oxygenated water to thereby rotationally inject the oxygenated water from the distribution device into the portion of water and encourage dispersion of the oxygenated water therein; and introducing a medicinal substance into the oxygenated water or the portion of water, and creating a medicinal bath; wherein the process comprises monitoring the dissolved oxygen level in the portion of water, and performing the restricting and injecting when the monitored dissolved oxygen level falls below a predetermined level.

9. The process of claim 8 , wherein the inline saturator dissolves oxygen into a stream of water from the body of water and removes nitrogen from the stream of water, producing the oxygenated water for injection.

10. The process of claim 9 , wherein the dissolved oxygen level is raised to at least 100 percent saturation and maintained at 100 percent saturation or greater throughout the process.

11. The process of claim 10 , wherein the dissolved oxygen level is raised to at least 150 percent saturation and maintained at 150 percent saturation or greater throughout the process.

12. The process of claim 11 , wherein the dissolved oxygen level is raised to at least 200 percent saturation and maintained at 200 percent saturation or greater throughout the process.

13. The process of claim 12 , wherein the medicinal substance injected is at least one of pyrethroids, organophosfates, and hydrogen peroxide.

14. The process of claim 13 , further including holding the fish in the medicinal bath for a predetermined amount of time.

15. The process of claim 14 , wherein the fish are held in the medicinal bath for an amount of time sufficient to treat the fish.

16. The process of claim 8 , wherein the oxygenated water is rotationally injected from a centre of the cage into the portion of the body of water.

17. The process of claim 8 , wherein the oxygenated water is rotationally injected from a circumference of the cage into the portion of the body of water.

18. The process of claim 17 , wherein the movement of water is restricted by a tarp or skirt enclosing the part of the cage.