Brunswick Jetters Ltd. Over ten years in organic development, the teslaH2O net-washing system. Finfish marine farm nets tend to accumulate naturally-occurring marine organisms during seasonal spatfall sets—notably mussels, bryozoans and caprillids. As fouling organisms develop, they restrict life-giving water flow to the penned fish. If such accumulations are left to maturity, they harbour bacteria, tax oxygen levels, and can weigh down attachment points, flotation pontoons, and supportive anchoring systems.
- BC Salmon Farmers Association sustaining member
- Directed by industry veteran Darren Reid
- Aquaculture Association of Canada voting member since 1991.
- Commercial diving labor contractor since 1992.
- Participating in the British Columbia salmon farming industry since 1994.
Director Darren Reid is a graduate of two applied science college curriculums:
- NBCC St. Andrews; aquaculture technology.
- Seneca College of Applied Arts and Technology, National Energy Board of Canada; Category 1 Air diving, with high honours.
Historically, net cleaning was a reactive measure. Net maintenance was often left until the fouling community had grown enough to be considered problematic.
Current standard net washing procedures involve removing a fouled net and replacing it with a clean one. Substantial equipment, expense, manpower and time are involved in this process. Feeding time is often lost and fish are stressed due to handling. The fouled net is sent to a land-based facility for washing in huge drums. Drum washing is the most significant factor contributing to net degradation. Once the net has been through the “wringer”, it must be untangled, feathered out, repaired of incidental tearing and other damage and inspected.
In an effort to minimize net handling, it has become the industry standard to incorporate the use of an active copper compounds to delay organic accumulation. This ionic release by its chemical properties leaches, creating a less favorable environment for settling organisms. While this “paint” impregnated into the net fibers is considered generally effective, its success depends entirely on site specifics and its ionic release capability. It is a very expensive application and its use is being reconsidered in efforts to maintain the highest standards of environmental sensitivity.
British Columbia salmon producers have a mandate to continually improve environmental stewardship initiatives. There is a move to ISO accreditation, and producers have a long standing reputation for seeking best alternatives. Sensitivity to environmental issues relates directly to best husbandry practices and the greatest care is taken to optimize a healthy and sustainable growing site.
An alternative to standard net cleaning is required; one that is efficient, cost effective, and reduces fish and net handling. Brunswick Jetters Ltd. presents the solution – an in-situation (“in-situ”) procedure that can provide timely removal of organics while still in the juvenile stage of development. For fish health, system integrity, and proactive environmental initiatives- optimal and timely in-situ net cleaning supports excellent husbandry practices and results in quality production and bottom line revenue.
Using innovative and progressive technology, Brunswick Jetters Ltd. has refined the net washing process. Partnering with salmon producers to increase yields, optimize fish health and embrace environmental stewardship, we bring on the benefits, advantages and features of a diver operated “in situ” net and system power-washing service.
- Added security. Our method adds to escape prevention measures by reducing fish transfers.
- Comprehensive in water net inspections are improved by added frequency and closer examination.
- Divers are specially trained net repair specialists.
- Optimal flow is maintained. Competing organisms with a taxing oxygen demand are timely removed before bacteria residency takes place. Further reduction in antibiotic use can be expected with resultant improvements in fish health. Energy can be targeted at improved EFCR’s (economical food conversion ratios).
- Indirect costs are saved as fish handling stress is reduced. Feeding rates are comparatively better maintained. Mortality is reduced.
- An efficient alternative to using environmentally suspect and expensive active copper antifoulants or other mitigation retardants.
- Proactive timely removal of naturally occurring juvenile marine growths speeds cleaning procedures and negates sedimentation concerns. The ocean has a huge capacity to recycle its own nutrients. Properly timed early removal significantly reduces potential discharge, avoiding the threat of anoxic composting.
- Environmentally friendly, organic approach employs our unique seawater only pressurized system.
- Huge operating costs are recovered with reduced net handling. Direct costs are saved respecting manpower, equipment, freight and drum washing fatigue.
- Convenience. Nets and systems are washed underwater. No support staff or additional equipment is required.
- Time is saved; productivity triples that of other existing “in situ” underwater pressure washing technology.
- Fully accessorized 195 BHP turbo charged diesel generated seawater power-washing unit.
- Jetting tools are engineered for peak performance (optimal square footage covered). Counter thrust does not disturb the fish as special balancing nozzles are diffused.
- PSI and flow are fully throttled to meet specific fouling requirements. This “hand washing” technique has proven to significantly extend net life. Fouled net changes and drum washing are known degradation factors.
- Fully equipped and self sufficient dive vessels accommodate a crew of three WCB accredited commercial diver/ net technicians.
- Boat and trailer system is available for full coast service.
Exceeding Best Management Practice standards is both progressive and responsible. Our domestic salmon aquaculture industry is to be commended for all efforts to embrace forward thinking initiatives.
Department of Fisheries and Oceans fully support alternatives that reduce or eliminate the use of antifouling compounds. Brunswick Jetters Ltd. provides a fully equipped, efficient, environmentally responsible, safe and cost effective means of maintaining high fish husbandry standards.