Hydra International - Natural Aquatic Treatments, Cleaning & Protecting the Environment

Laminar Air Disc Diffuser System ET60D270 is complete with 25m of 3/4" air hose, hose clips a linear air pump and a commercial grade EPDM sleeved diffuser mounted on a corrosion resistant weighted base.
A vented waterproof enclose for the air pump is available at £18.00.

• Laminar Air Disc Diffuser System for Circular Ponds/Lakes is highly effective for large bodies of water whilst retaining the natural look of the water body.
• Improves quality of water e.g. less algae growth.
• Promotes the break-down of toxic substances in the water, like ammonia and nitrite.
• Ideal for use in winter for de-icing and de-stratification.
• Improves quality of life for fish and aquatic organisms.
• Supplies oxygen to the water as well as mixing different levels
• Commercial grade construction.
• Keeps useful aerobic bacteria active.
• Prevents water from stagnating and smells emanating.

The Problem

• Poor water quality
• Unsightly  algae
• No Beneficial bacteria
• Minimal Aquatic Life
• Oxygen Deficient Water 
• High Nutrient Load
• Harmful COD Levels

Does this sound like your pond or lake?

Lakes and ponds are living aquatic ecological systems, which have fish, vegetation and various types of organisms, both vertebrates and invertebrates, all of which require oxygen to live and thrive. Most pond owners don’t realize that it’s not a question of “if”, but a matter of “when” they could face the consequences of a fish kill due to oxygen depletion.

Oxygen depletion occurs because oxygen is used even when there is insufficient natural water current, wind or sunlight occurring. Waste products are generated from various sources such as fish wastes, unutilized fish feed, dying or decomposing vegetation and leaves from surrounding trees, organic and inorganic sediment deposits from nearby runoff and nutrient build ups from all of the aforementioned. These waste products are decomposed by a biological process called oxidation and in this process large amounts of oxygen are required. This spells disaster for any fish in the pond, since all the water is literally “instantly robbed” of oxygen. The most common time when this occurs is after a cold, hard rain or in the heat of summer.

The purpose of any pond aeration system is to introduce oxygen into the water column. Oxygen efficiency is the measure of the amount of oxygen (in pounds of oxygen per acre) created by one horsepower of energy. Aeration of water is achieved by exposure of water to air, which contains oxygen. In nature, wind activity provides this in large bodies of water by creating waves, which both moves the water by creating currents and also oxygenates it by exposure to the air. Subsurface aeration has the unique ability to create what is known as an airlift current from the bottom to the top of the pond/lake, while at the same time introducing oxygen to the water through millions of tiny air bubbles.

The air bubbles rising from the bottom to the surface of the pond/lake originate from self-cleaning flexible membrane diffusers. These aerate the water body by the most economical and efficient method: de-stratification and can lift the maximum amount of water from the bottom to the surface using the minimum of energy. The surface boil, created by the kinetic energy of the rising water, rises about 2 inches above the surrounding water level. From there, the water rushes outward until its energy has dissipated, sometimes traveling more than 100’, then revolving back down in a clockwise manner back to the water body bottom and up again. This completes a full 360 degree circulation cycle, a critical component of water circulation efficiency. This high oxygen efficiency is achieved due to the fact that so much surface area of air (from the literal millions of bubbles that create huge amounts of surface area) is coming in direct contact with the water, which translates into “water touching bubbles” in layman’s terms. Because these systems require very little horsepower to operate (i.e. low energy costs), the net cost to produce the oxygen is greatly reduced, thus substantially increasing the oxygen efficiency.

By starting the bubbles at the bottom of the water body and allowing them to rise up the entire column of water, the water in the pond is exposed to a tremendously larger amount of oxygen than a traditional surface aerator could ever hope to create. In addition to this, the use of fine bubbles is far more efficient than that of coarser bubbles. This is due to the higher amount of surface area of many smaller vs. one large air bubble. When aeration systems are employed, available nutrients are highly utilised and thus reduced by the abundance of aerobic bacteria, thereby starving the algae of food and tremendously reducing the amounts of algae. In many cases, the savings in treatment costs to control algae offsets the cost of a subsurface aeration system. The Hydra Laminar Flow Sub-Surface Aeration Systems provide the best oxygen efficiency of any aeration system.