Scott Aerator DA-20 1/2 HP Pond Aerator 230V 200 ft Cord – Floating Lake Aeration System for Algae & Water Quality
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Description
The Scott Aerator DA-20 1/2 HP Display Aerator is the workhorse of the Scott Aerator product line. Moving 400 gallons of water per minute in a trumpet-shaped cascading spray pattern approximately 6.5 feet tall and 22 feet wide, the DA-20 delivers functional high-volume aeration with a decorative presence. Designed for ponds up to 1 acre, the DA-20 increases dissolved oxygen, reduces algae and foul odors, breaks down organic muck, and supports healthy fish populations — all with a maintenance-free oil-free stainless steel motor backed by Scott Aerator's unconditional 5-year motor warranty.
What's Included — DA-20 1/2 HP Standard Kit
Aerator Assembly
- DA-20 Display Aerator — 1/2 HP, 230V, stainless steel oil-free motor
- Heavy-duty float platform
- Stainless steel wire basket (debris screen)
- Pre-installed aeration propeller
- 3 self-tapping screws
Power Cord
- 200 ft, 12-gauge submersible power cord
- 230V configuration
- Plug included — connects to dedicated 15-amp GFCI circuit
Documentation
- Installation and operator manual
- 5-year unconditional motor warranty card
Required — Not Included
- Two nylon mooring ropes (purchaser to supply)
- Two 30-lb anchoring weights or concrete blocks (purchaser to supply)
- Dedicated 15-amp GFCI circuit (electrical installation)
- LED lighting kits — optional add-on, order separately
Technical Specifications
| Specification | Detail |
|---|---|
| SKU | 14020 |
| Horsepower | 1/2 HP |
| Voltage | 230V (also available in 115V — call to order) |
| Amperage | 5 amps at 230V (115V model: 10 amps) |
| Power Consumption | 670 Watts |
| Motor Speed | 3,450 RPM |
| Frequency | 60 Hz, single-phase |
| Flow Rate | 400 GPM (24,000 GPH) |
| Spray Pattern | Trumpet-shaped cascading spray — approx. 6.5 ft tall × 22 ft wide (adjustable in width) |
| Cord Length | 200 ft, 12-gauge submersible |
| Minimum Pond Depth | 32 inches |
| Pond Size | 1/8 acre minimum — up to 1 acre ideal coverage |
| Motor Type | Oil-free, stainless steel, submersible — no maintenance |
| Warranty | 5-year unconditional motor warranty |
| Certifications | ARL-tested and approved — UL and National Electric Code compliant |
| Saltwater Approved | Yes — suitable for brackish and saltwater retention ponds |
| Winter Operation | Year-round — no winterizing required; leave in water |
| Country of Origin | Made in USA — Spring Lake, Michigan |
DA-20 Series — HP Comparison
| Model | HP | Flow Rate | Spray (H × W) | Coverage | Voltage |
|---|---|---|---|---|---|
| DA-20 1/3 HP | 1/3 HP | 300 GPM | 5 ft × 18 ft | Up to 1/2 acre | 115V or 230V |
| DA-20 1/2 HP ← | 1/2 HP | 400 GPM | 6.5 ft × 22 ft | Up to 1 acre | 115V or 230V |
| DA-20 3/4 HP | 3/4 HP | 450 GPM | 6.8 ft × 25 ft | Up to 1.5 acres | 115V or 230V |
| DA-20 1 HP | 1 HP | 500 GPM | 7 ft × 25 ft | Up to 1.5 acres | 115V or 230V |
| DA-20 1.5 HP | 1.5 HP | 600 GPM | 10 ft × 25 ft | Up to 2 acres | 230V only |
| DA-20 2 HP | 2 HP | 700 GPM | 11 ft × 26 ft | Up to 2 acres | 230V only |
| DA-20 3 HP | 3 HP | 800 GPM | 11 ft × 32 ft | 3+ acres | 230V only |
Not sure which HP is right for your pond? Call or text us — we size aerators for free: (765) 508-4352.
Why the Scott Aerator DA-20?
- 400 GPM is the threshold where aeration becomes meaningful for a 1-acre pond. Moving 400 gallons per minute means the entire 300,000-gallon volume of a 1-acre pond at 5 feet deep cycles through the aerator approximately every 12.5 hours at full volume — but the surface agitation and oxygen injection are continuous and immediate. At this flow rate the DA-20 creates a visible reduction in algae surface coverage within weeks of installation, and most owners see measurable dissolved oxygen improvements within days.
- The trumpet-shaped spray injects oxygen more efficiently than a boil-style aerator. By launching water 6.5 feet into the air in a spreading trumpet pattern 22 feet wide, the DA-20 maximizes water-to-air contact time. Each gallon of water travels upward through open air and then falls back through the spray zone — two oxygen-transfer events per gallon per cycle. Boil-style aerators, by contrast, agitate water at the surface with significantly less air exposure. For a pond with serious algae or dissolved oxygen deficit, the DA-20's display-style spray is more effective per watt than surface-rotor designs.
- 5-year unconditional motor warranty — longest standard warranty in the surface aerator category. Scott Aerator's warranty is unconditional — it covers the motor regardless of how many hours it runs, whether it's operated 24/7 year-round, or whether it freezes into the pond in winter. The DA-20 is engineered for continuous operation from day one, and Scott Aerator stands behind that design claim for five full years.
- No oil, no maintenance, no winterizing. The oil-free design eliminates the three most common maintenance headaches in surface aeration: oil changes, oil contamination risk, and fall/spring removal cycles. When temperatures drop, shut off the power, let the unit freeze in place, and turn it back on in spring. No oil-seal cracking from winter storage, no spring re-commissioning beyond plugging it back in.
- 230V at 5 amps — efficient for long cord runs. Running 230V over 200 feet loses far less voltage than 115V over the same distance (voltage drop scales with current, and the 230V DA-20 draws 5 amps vs. 10 amps for the 115V model). At 200 feet of cord, the 230V model is the correct choice for maintaining adequate motor voltage at the pump. The dedicated 15-amp GFCI circuit required provides ample headroom above the 5-amp draw.
- ARL-tested and UL/NEC compliant as a complete package. Scott Aerator submits each DA-20 configuration (motor + float + cord) as a complete package to ARL for compliance testing against UL standards and the National Electric Code. This is not a component-level certification — the complete installed system is what's certified. For commercial or HOA applications where documentation may be required, Scott Aerator can provide compliance documentation on request.
Frequently Asked Questions
What is the flow rate and spray pattern of the 1/2 HP DA-20?
The 1/2 HP DA-20 moves 400 gallons of water per minute (24,000 gallons per hour) in a trumpet-shaped cascading spray pattern approximately 6.5 feet tall and 22 feet wide (adjustable in width). The spray can be narrowed on request. This is a Display Aerator — it has a visible decorative spray pattern in addition to its primary aeration function. It is not a subsurface bubbler or a flush boil-style aerator.
What are the electrical requirements for the 230V DA-20 with a 200 ft cord?
The 1/2 HP 230V model draws 5 amps at 230V, consuming 670 watts. A dedicated 15-amp GFCI circuit is required — a standard 15-amp 230V circuit provides ample headroom above the 5-amp draw. Do not use an extension cord or share the circuit with other loads, as this can cause voltage drop and damage the motor over time. Running 230V over 200 feet is significantly more efficient than 115V — the lower amperage (5A vs. 10A for 115V) reduces resistive line loss substantially over long cord runs. The DA-20 is also available in 115V — call to order: (765) 508-4352.
What is the minimum pond depth for the DA-20 1/2 HP?
The DA-20 1/2 HP requires a minimum pond depth of 32 inches. This depth keeps the motor fully submerged for cooling and provides clearance to prevent the intake from pulling up bottom silt or debris. For ponds shallower than 32 inches, Scott Aerator offers a Shallow Water Adapter accessory — call us to discuss: (765) 508-4352.
Are mooring ropes and anchoring weights included?
No — mooring ropes and anchoring weights are not included and must be purchased separately. Scott Aerator specifies two nylon mooring ropes and two 30-pound weights or concrete blocks for proper anchoring. This equipment is required for installation — the aerator must be tethered to prevent wind and water movement from repositioning it in the pond. Scott Aerator sells mooring line; concrete blocks can be sourced locally. Call us for anchoring advice specific to your pond: (765) 508-4352.
How does the DA-20 improve water quality and reduce algae?
The DA-20 attacks the root cause of algae, muck, and foul odors: dissolved oxygen deficit. When a pond's oxygen levels drop — from hot weather, organic loading, or stratification — algae thrive, beneficial bacteria slow down, and organic matter accumulates as muck rather than decomposing. The DA-20's 400 GPM flow launches water into the air and back, increasing dissolved oxygen at the surface. Higher oxygen levels accelerate beneficial bacterial decomposition of bottom muck, suppress algae growth directly (many algae species thrive in low-oxygen conditions), and release toxic gases like methane and hydrogen sulfide from the water column. Ponds with consistent aeration also maintain more uniform temperature throughout the water column, reducing thermal stratification that exacerbates oxygen depletion in warm months.
Can the DA-20 be used in saltwater or brackish ponds?
Yes. The DA-20's oil-free stainless steel motor is approved for saltwater use. It is a suitable choice for coastal brackish retention ponds, saltwater management ponds, and farm ponds with elevated mineral content where standard motor materials would corrode more quickly.
Is the DA-20 winter-ready? Does it need to be removed in fall?
No removal required. The DA-20 is engineered for year-round operation and does not need to be removed, drained, or winterized. When temperatures drop and you want to turn it off for the season, simply disconnect power at the circuit breaker and leave the unit in the water. All components withstand sub-zero conditions — the motor, float, cord, and propeller assembly can freeze in solid ice without damage. Restore power in spring after the ice thaws. Many owners also run the DA-20 continuously through winter as a de-icer, since the constant water movement prevents the pond from freezing solid around the unit and near docks or structures.
What is the difference between the DA-20 and a standard decorative fountain?
Standard decorative fountains prioritize spray height and visual pattern — a narrow vertical jet or an ornamental nozzle pattern — with relatively low flow rates. The DA-20 is a "Display Aerator": it produces a high-volume trumpet-shaped spray with maximum water-to-air contact for oxygen transfer, rather than a thin vertical column. At 400 GPM, the DA-20 moves approximately 60 times more water than a typical decorative 1/2 HP fountain nozzle. The display pattern is visually attractive — roughly 6.5 feet tall and 22 feet wide — but the aerator is sized and engineered for water quality improvement first, with aesthetics as a secondary benefit. If your primary goal is visual display with minimal aeration, a Scott Aerator Amherst or Skyward fountain may be a better fit. If your goal is water quality with a display presence, the DA-20 is the correct choice.
Why Buy From Pond Pro Direct?
- Authorized Scott Aerator dealer — unconditional 5-year motor warranty fully supported on all DA-20 units.
- Free aerator sizing consultation — call or text us and we'll size the right HP for your pond acreage, depth, and water quality goals: (765) 508-4352.
- Full DA-20 HP range available — 1/3 HP through 3 HP, 115V and 230V configurations, cord length options.
- Price Match Guarantee — beat any lower authorized dealer price by $50 on orders over $2,000.
- Free nationwide shipping. 30-day return period. Call or text (765) 508-4352, Mon–Fri 9 AM–5 PM EST.
Scott Aerator DA-20 1/2 HP Display Aerator (SKU 14020): 400 GPM, trumpet-shaped spray 6.5 ft tall × 22 ft wide, 230V 5-amp oil-free stainless motor, 200 ft 12-gauge submersible cord, 32-inch minimum depth, up to 1 acre, year-round operation, no winterizing required. Unconditional 5-year motor warranty. Made in USA — Spring Lake, Michigan. Note: mooring ropes and anchoring weights required and sold separately. LED lighting kits optional.
Need help choosing between the 1/2 HP, 3/4 HP, or 1 HP? Prefer 115V over 230V? Need a shorter or longer cord? Call or text (765) 508-4352 — Monday through Friday, 9 AM to 5 PM EST.
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