Scott Aerator DA-20 Display Aerator
A 0.5 HP floating aerator from a maker with US support, for owners who want a unit built to stay in the water year round and are willing to pay for the warranty.
Amazon $1,919$1,919
The Scott Aerator DA-20 Display Aerator rates 2.9 among floating aerators pond aerators; the Kasco RobustAire 1/4 HP rates 2.8 among lake compressors ones. The Kasco RobustAire 1/4 HP costs $288 less ($1,631 vs $1,919).
Prices were last checked November 4, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
Kasco RobustAire 1/4 HP
#12 in Lake compressorsFull review
A shore-mounted diffused-aeration compressor for owners who want a US-supported brand and a weatherproof cabinet, at several times the price of generic kits.
Amazon $1,631$1,631
Scores side by side
These two sit in different type classes (floating aerators and lake compressors), and each is scored against the reference points for its own class, so a rating says how well each does among its own type peers. How we rank explains each factor.
| Factor weight | Scott Aerator DA-20 Display Aerator | Kasco RobustAire 1/4 HP |
|---|---|---|
| Overall rating | 2.9/5 | 2.8/5 |
| Value 35% | 0 $3,838 per horsepower ($1,919) | 50 rated acreage not published (neutral score used) |
| Output 20% | 20 0.5 HP motor | 50 airflow not published (neutral score used) |
| Efficiency 20% | 50 flow or watts not published (neutral score used) | 50 airflow or watts not published (neutral score used) |
| Warranty 25% | 100 5-year warranty | 0 warranty not published, scored as none |
Specifications
| Scott Aerator DA-20 Display Aerator | Kasco RobustAire 1/4 HP | |
|---|---|---|
| Aeration | ||
| Water flow | 18,000 gal/h | - |
| Power | ||
| Motor | 0.5 HP | 0.2 HP |
| Running amps | 8 A | - |
| Voltage | 115 V | 120 V |
| In the box | ||
| Diffusers | - | 1 |
| Power cord | 70 ft | - |
| Build | ||
| Warranty | 5 years | - |