Aqua Ultraviolet Sterilizers – are proven dependable solutions for controlling algae, bacteria, and protozoa. The ultraviolet lamp emits a germicidal ray which alters or disrupts the DNA or RNA of single-celled organisms. By properly implementing an Aqua Ultraviolet System in-line these organisms can be eradicated effectively without any harmful residuals.
UV Controls the spread of fish disease and keeps your water clear by destroying free-floating algae.
Ultima II Filter series – Bio-Mechanical Filtration Systems – Combination of both biological and mechanical filtration in one compact body. Supports aquatic life in bodies of water whether it’s an Aquaculture Facility, Backyard or Commercial Pond, or Large Aquarium.
Effective use of UV pond filters located at strategic points in the process can protect the overall integrity of the end product, lower maintenance costs by decreasing the microbial load.
In daily conversation, we just say “filter” or “filter system.” There are two main categories of filtration—mechanical and biological. It is important to understand the differences between the two.
In mechanical filtration, the filter physically separates and removes any wastes or solids. It is like a vacuum cleaner. If we go back to the example of living only in one room, once the room gets dirty with leftover food and waste, you would clean it with a vacuum cleaner. But the problem is that while physically removing waste makes the room appear clean, the waste still would leave behind polluted air in the room. In a Koi pond, the solids can be physically removed; and the water look crystal clear. But toxic substances like ammonia dissolved in the water will remain. This is why it is often said that clear water is not necessarily healthy water. Both solids and toxic substances must not only be visually removed, but also decomposed and purified.
This brings us to the second type of filtration—biological filtration. In biological filtration, we use help from bacteria. Beneficial (nitrifying) bacteria detoxify and purify the water. – excerpt taken from https://www.kodamakoigarden.com/understanding-koi-pond-filter-system/
Ultraviolet (UV) light disinfection systems play an important role in a complete water treatment process in aquaculture facilities.
How Do They Work?
A common way for homeowners to keep their pond water clear is by the use of a UV pond filter. If you use a high-quality biological filter that is capable of filtering your size pond and fish load you will not likely need a UV pond sterlizer. If the filter is not capable of filtering your pond, you will have excess nutrients in the water and will likely have a green water algae problem. A UV pond filter works by passing the water through a tube next to a UV bulb. The high intensity light kills off the microscopic algae cells that form green water. Make no mistake, a UV will not control string algae since the string algae do not flow through the tube next to the the light bulb.
You will notice some manufacturers call their units UV pond sterilizers. The only difference between a UV clarifier and a UV sterilizer is how fast the water flows through the tube. Algae cells are relatively easy to kill so you can pass the water (and the cells) through the tube at a faster rate and still achieve results. Many other microorganisms (bacteria, virus strains, etc.) are harder to kill so the water needs to pass through the tube slower to achieve a complete kill. The slower the water passes through, the smaller the pond size it can effectively control. Manufacturers who try to control algae call their units “clarifiers” and publish higher flow rates while those who sterilize the water of all living organisms use slower flow rates. A UV clarifier can be used as a sterilizer by simply slowing down the flow of water passing through it.