Main trade-off
Hayward TigerShark QC
The full cycle takes four hours.
Head-to-head
Hayward TigerShark QC vs Polaris ERA 820: Hayward adds waterline coverage, Polaris eases top-access debris handling
The short answer
TigerShark QC is the better fit when waterline coverage or its 90-minute quick cycle matters. ERA 820 makes debris handling easier with a four-liter top canister and included caddy.
Before you choose
The reasoning and the trade-offs
Cable: the size of the gap
For “Cable”, the published figure is 9% higher for Polaris ERA 820, at 60 ft compared with 55 ft for Hayward TigerShark QC.
What this is based on
This affects working reach and where the main unit or power source must stay during use. The percentage uses the lower published figure as the baseline.
Main trade-off
Polaris ERA 820
It does not offer app control or a recurring schedule.
Hayward TigerShark QC
- Choose it for
- Waterline cleaning is required.
- A 90-minute quick cycle is useful.
- Main trade-off
- The full cycle takes four hours.
Polaris ERA 820
- Choose it for
- A large top canister matters.
- A swivel cable is important.
- Main trade-off
- It does not offer app control or a recurring schedule.
About this comparison
Compare a proven dual-cycle cleaner with a newer large-canister Polaris.
The practical choice turns on cleaning zone and cycles, then on the constraints in your own setup.
Winner by situation
Start with what you need it to do
The waterline needs regular scrubbing
For cleaning zone, Hayward TigerShark QC records “Floor, walls, coves, waterline” and Polaris ERA 820 records “Floor and walls”. This physical layout changes what fits, what can stay separate and how the product is loaded or emptied.
- Hayward TigerShark QC
- Better fit
- Polaris ERA 820
- Depends
Fine dust, sand or dead algae settles in my pool
For debris handling, Hayward TigerShark QC records “Filter cartridges” and Polaris ERA 820 records “4-liter canister”. This changes the hands-on cleaning, filling or disposal work required during ownership.
- Hayward TigerShark QC
- Better fit
- Polaris ERA 820
- Depends
I want fewer stops to empty the filter
A larger nominal basket provides more collection space. Debris size, filter loading and cleaning mode determine when it needs attention.
- Hayward TigerShark QC
- Depends
- Polaris ERA 820
- Better fit
My pool has steps, coves or tricky ledges
Check the documented minimum water depth, platform length and width, and access route. Wall climbing does not establish stair or shelf coverage.
- Hayward TigerShark QC
- Better fit
- Polaris ERA 820
- Depends
I need strong flow for frequent heavy debris
Its documented flow or collection arrangement is relevant to debris handling. Neither figure predicts pickup or time between emptying.
- Hayward TigerShark QC
- Depends
- Polaris ERA 820
- Better fit
My pool is large or close to 50 feet
For cable, Hayward TigerShark QC records “55 ft” and Polaris ERA 820 records “60 ft swivel”. This affects working reach and where the main unit or power source must stay during use.
- Hayward TigerShark QC
- Similar
- Polaris ERA 820
- Similar
What matters in practice
The differences that matter
Cable: the size of the gap
For “Cable”, the published figure is 9% higher for Polaris ERA 820, at 60 ft compared with 55 ft for Hayward TigerShark QC.
How we reached this conclusion
This affects working reach and where the main unit or power source must stay during use. The percentage uses the lower published figure as the baseline.
The needs that actually separate these two
Hayward TigerShark QC has the stronger fit for “The waterline needs regular scrubbing” and “My pool has steps, coves or tricky ledges”. Polaris ERA 820 has the stronger fit for “I need strong flow for frequent heavy debris” and “I want fewer stops to empty the filter”.
How we reached this conclusion
This compares the current strong and useful fit assignments for the exact products. It does not turn them into one overall score.
The selected needs do not separate this pair
Both products cover the same 2 of 2 buyer requirements attached to this comparison. The choice moves to “cleaning zone” and “cycles”.
How we reached this conclusion
This checks the two products against the same selected needs, then names the first verified differences that remain.
Finding models for “My pool is large or close to 50 feet” and “I prefer corded power without a battery deadline”
12 of 27 checked robot pool cleaners cover both “My pool is large or close to 50 feet” and “I prefer corded power without a battery deadline”. Both products are in that group.
How we reached this conclusion
The count is reproduced by filtering the current category dataset for products with a strong or useful fit for both needs.
Choice A
Hayward, RC9990CUB
TigerShark QC
A durable older-school corded robot with a 90-minute quick clean and a four-hour full scrub.
- Best matched use
- 20-by-40-foot pools that need verified multi-surface compatibility and a fast-cycle option
Checked facts
- Hayward rates it for pools up to 20 by 40 feet and common pool surfaces.
- It cleans floor, walls, coves and waterline.
- The 55-foot cord supports a four-hour full cycle and 90-minute Quick Clean.
Choice B
Polaris, FERA820
ERA 820
A straightforward corded Polaris with a four-liter top canister, 60-foot cable, caddy and cover.
- Best matched use
- Large in-ground pools that need robust floor and wall cleaning without app controls
Checked facts
- The ERA 820 includes a 60-foot swivel cable.
- It cleans the floor and walls in a 2.5-hour cycle.
- A four-liter canister, caddy and cover are included.
Meaningful differences
What changes the fit
| What changes | Hayward TigerShark QC | Polaris ERA 820 | Why it matters |
|---|---|---|---|
| Cleaning zone | Floor, walls, coves, waterline | Floor and walls | This physical layout changes what fits, what can stay separate and how the product is loaded or emptied. |
| Cycles | 90 min or 4 hours | 2.5 hours | This changes how many steps the user handles and how much of the routine is automated. |
| Cable | 55 ft | 60 ft swivel | This affects working reach and where the main unit or power source must stay during use. |
| Debris handling | Filter cartridges | 4-liter canister | This changes the hands-on cleaning, filling or disposal work required during ownership. |
What you give up
Every choice has a cost
If you choose Hayward TigerShark QC
- There is no app, weekly schedule or cable swivel.
If you choose Polaris ERA 820
- The listed zones stop at floor and walls, not the waterline.
What the facts say
What the comparison shows
Useful conclusions from the current robot pool cleaners comparison, followed by the checked facts used to reach them.
Compared set
12 of 27 models checked match every need here: “My pool is large or close to 50 feet” and “I prefer corded power without a battery deadline”.
12 matching models from 27 checkedMeasured difference
Hayward TigerShark QC lists 240 min for published full cleaning cycle, 60% above Polaris ERA 820 at 150 min.
- Hayward TigerShark QC
- 240 min
- Polaris ERA 820
- 150 min
- Comparable models
- 13 of 27
See the checked facts and calculation notes
Match countThe count uses the current product-to-need assignments for “My pool is large or close to 50 feet” and “I prefer corded power without a battery deadline”. A need with no documented match does not count.
Calculation noteHours are converted to minutes. Optional quick modes and unlimited corded operation are excluded. 13 of 27 models have comparable published figures for context.
| Product | Needs matched | Checked facts | Source records |
|---|---|---|---|
| Hayward TigerShark QC |
|
| |
| Polaris ERA 820 |
|
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Ready to choose?
Check the price. Read the owner reviews.
Open either model on Amazon to check the current price, customer reviews and delivery options.
Hayward TigerShark QC
Waterline cleaning is required.
See price & reviews on AmazonPolaris ERA 820
A large top canister matters.
See price & reviews on AmazonLinks open in a new tab.