The catch
Hayward TigerShark QC
A full cycle runs for four hours.
Side by side
Hayward TigerShark QC vs Polaris ERA 820 Compared: Polaris makes debris handling easier through top access, Hayward covers the waterline
Quick verdict
If waterline coverage or the 90-minute quick cycle matters to you, TigerShark QC fits better. ERA 820 makes handling debris easier, thanks to a four-liter top canister and an included caddy.
Before you buy
Why, and what it costs you
Cable: how big the gap is
The published “Cable” figure is 9% higher on Polaris ERA 820: 60 ft, against 55 ft on Hayward TigerShark QC.
Where this comes from
This sets your working reach and where the main unit or power source has to sit while you work. The percentage is worked out from the lower published figure.
The catch
Polaris ERA 820
App control and a recurring schedule are both absent.
Hayward TigerShark QC
- Why pick it
- You need the waterline cleaned.
- You would use a 90-minute quick cycle.
- The catch
- A full cycle runs for four hours.
Polaris ERA 820
- Why pick it
- You want a big canister on top.
- Cable swivel is a priority.
- The catch
- App control and a recurring schedule are both absent.
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What this page compares
A proven dual-cycle cleaner faces a newer Polaris with a large canister.
This one comes down to cleaning zone and cycles first, then to the limits of your own setup.
Which one fits
Pick the situations that sound like you
Regular scrubbing is needed at the waterline
Hayward TigerShark QC lists “Floor, walls, coves, waterline” for cleaning zone, while Polaris ERA 820 lists “Floor and walls”. The physical layout decides what fits, what stays separate and how you load or empty it.
- Hayward TigerShark QC
- Better fit
- Polaris ERA 820
- Depends
My pool collects fine dust, sand or dead algae
Hayward TigerShark QC lists “Filter cartridges” for debris handling, while Polaris ERA 820 lists “4-liter canister”. This changes how much cleaning, filling and emptying you handle yourself as an owner.
- Hayward TigerShark QC
- Better fit
- Polaris ERA 820
- Depends
I would like to empty the filter less often
Its larger nominal basket gives debris more room. When it needs attention depends on debris size, how loaded the filter gets and the cleaning mode.
- Hayward TigerShark QC
- Depends
- Polaris ERA 820
- Better fit
Steps, coves or tricky ledges are part of my pool
Start with the documented minimum water depth, the platform's length and width, and the access route. A robot that climbs walls is not thereby shown to cover stairs or shelves.
- Hayward TigerShark QC
- Better fit
- Polaris ERA 820
- Depends
Heavy debris shows up often, so I need strong flow
The documented flow and collection setup bear on how it handles debris, but neither figure predicts how well it picks up or how long before you empty it.
- Hayward TigerShark QC
- Depends
- Polaris ERA 820
- Better fit
My pool is large or nearly 50 feet
Hayward TigerShark QC lists “55 ft” for cable, while Polaris ERA 820 lists “60 ft swivel”. This sets your working reach and where the main unit or power source has to sit while you work.
- Hayward TigerShark QC
- Similar
- Polaris ERA 820
- Similar
In practice
Differences you will notice
Cable: how big the gap is
The published “Cable” figure is 9% higher on Polaris ERA 820: 60 ft, against 55 ft on Hayward TigerShark QC.
How we worked this out
This sets your working reach and where the main unit or power source has to sit while you work. The percentage is worked out from the lower published figure.
Where these two really part ways
Hayward TigerShark QC is the better match for “Regular scrubbing is needed at the waterline” and “Steps, coves or tricky ledges are part of my pool”. Polaris ERA 820 is the better match for “Heavy debris shows up often, so I need strong flow” and “I would like to empty the filter less often”.
How we worked this out
This lines up the current strong and useful fit ratings for the exact products. It does not roll them into one overall score.
These needs do not split the pair
Both meet the same 2 of the 2 needs this comparison is built around, so the choice comes down to “cleaning zone” and “cycles”.
How we worked this out
Both products are checked against the same needs. The first verified differences still standing are named here.
Models that handle “My pool is large or nearly 50 feet” and “I would rather have corded power than a battery deadline”
12 of the 27 robot pool cleaners checked handle both “My pool is large or nearly 50 feet” and “I would rather have corded power than a battery deadline”. Both make the cut.
How we worked this out
You can reproduce the count by filtering the current category for models with a strong or useful fit on both needs.
Option A
Hayward, RC9990CUB
TigerShark QC
This durable, old-school corded robot offers a 90-minute quick clean and a four-hour full scrub.
- Best for
- A 20-by-40-foot pool that needs verified multi-surface compatibility along with a fast-cycle option
Facts we checked
- Hayward's rating covers pools up to 20 by 40 feet and common pool surfaces.
- Floor, walls, coves and waterline are all cleaned.
- With the 55-foot cord, a four-hour full cycle and a 90-minute Quick Clean are possible.
Option B
Polaris, FERA820
ERA 820
This plain corded Polaris comes with a four-liter top canister, a 60-foot cable, a caddy and a cover.
- Best for
- Large in-ground pools where you want solid floor and wall cleaning and no app controls
Facts we checked
- A 60-foot swivel cable comes with the ERA 820.
- Its 2.5-hour cycle covers the floor and walls.
- It comes with a four-liter canister, caddy and cover.
Spec by spec
Where they really differ
| Spec | Hayward TigerShark QC | Polaris ERA 820 | In practice |
|---|---|---|---|
| Cleaning zone | Floor, walls, coves, waterline | Floor and walls | How the unit is built determines what fits in it, what stays apart and how loading and emptying work. |
| Cycles | 90 min or 4 hours | 2.5 hours | How many steps fall to you and how much happens automatically both come down to this. |
| Cable | 55 ft | 60 ft swivel | It determines how far you can reach while working and where the main unit or power source has to be placed. |
| Debris handling | Filter cartridges | 4-liter canister | As an owner, how much cleaning, filling and emptying you do yourself depends on it. |
Trade-offs
What each pick costs you
With Hayward TigerShark QC
- It comes without an app, a weekly schedule or a cable swivel.
With Polaris ERA 820
- Floor and walls are the only listed zones, so there is no waterline cleaning.
By the numbers
What the data shows
What we found across the robot pool cleaners we compare, plus the checked facts behind each finding.
How many fit
12 of the 27 models checked meet every need here: “My pool is large or nearly 50 feet” and “I would rather have corded power than a battery deadline”.
12 models fit, out of 27 checkedThe gap in numbers
Hayward TigerShark QC lists 240 min for listed full cleaning cycle, 60% more than the 150 min on Polaris ERA 820.
- Hayward TigerShark QC
- 240 min
- Polaris ERA 820
- 150 min
- Models with this figure
- 13 of 27
Show the facts and the math
How we countedThe count uses each product's current fit ratings for “My pool is large or nearly 50 feet” and “I would rather have corded power than a battery deadline”. A need with no documented match is not counted.
How we calculatedCycles listed in hours are shown in minutes. Optional quick modes and unlimited corded running are left out. For context, 13 of 27 models publish comparable figures.
| Product | Needs it meets | Facts we checked | Sources |
|---|---|---|---|
| Hayward TigerShark QC |
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| Polaris ERA 820 |
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Ready to buy
See today’s price and what owners say
Open either model on Amazon for the current price, customer reviews and delivery options.
Hayward TigerShark QC
You need the waterline cleaned.
See price & reviews on AmazonPolaris ERA 820
You want a big canister on top.
See price & reviews on AmazonEach link opens in a new tab.
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