● Pool Covers · Comparison

WaterWarden Premium Pool Safety Cover vs Blue Wave NS420 16x32 Ft

Both made our Best Pool Covers shortlist, at #1 and #3. Here's how they differ and who each one suits.

✎ PickHonest Research Desk▦ Updated October 15, 2026◷ 6 min read

As an Amazon Associate I earn from qualifying purchases. Picks are based on manufacturer specs, independent reviews and owner reports.

WaterWarden Premium Pool Safety Cover for 12x20 Ft In-Ground PoolView on Amazon VS

Blue Wave NS420 16x32 Ft Rectangle Solar Pool Cover 12-Mil BlueView on Amazon

Quick verdict

Choose the WaterWarden Premium Pool Safety Cover for 12x20 Ft In-Ground Pool if you want genuine weight-bearing barrier, not just a debris shieldand classified under ASTM F1346. Choose the Blue Wave NS420 16x32 Ft Rectangle Solar Pool Cover 12-Mil Blue if you'd rather have 12-mil thickness is the sweet spot between an 8-mil cover that tears too easily and a 16-mil cover that costs much more. Overall we rank the WaterWarden Premium Pool Safety Cover for 12x20 Ft In-Ground Pool higher: #1 versus #3 in our Best Pool Covers list.

Winner overall: WaterWarden Premium Pool Safety Cover for 12x20 Ft In-Ground Pool

WaterWarden Premium Pool Safety Cover for 12x20 Ft In-Ground Pool vs Blue Wave NS420 16x32 Ft Rectangle Solar Pool Cover 12-Mil Blue compared

Every difference that matters, in one table.

Keep researching

Best Pool Covers
WaterWarden Premium Pool Safety Cover for 12x20 Ft In-Ground Pool review
Blue Wave NS420 16x32 Ft Rectangle Solar Pool Cover 12-Mil Blue review
All pool covers

Bottom line

Best overall

WaterWarden Premium Pool Safety Cover for 12x20 Ft In-Ground Pool

WaterWarden

Genuine weight-bearing barrier, not just a debris shieldand classified under ASTM F1346

UL-classified per ASTM F1346
Solid vinyl, blocks nearly 100% of sunlight
20-year warranty
Anchors into deck-set brass points
Rated for adult foot traffic

Pros

12-mil thickness is the sweet spot between an 8-mil cover that tears too easily and a 16-mil cover that costs much more
5-year seam warranty beats most budget solar covers, which often carry no seam coverage at all
Nearly 3,200 ratings at 4.4 stars is a large enough sample to trust the durability claims
Fits standard 16x32 rectangular pools without custom cutting

Cons

Still a wear item, expect noticeable bubble degradation by year 4-5 even with the 5-year warranty
Needs a reel to handle without wrinkling or tearing at this size
Adds zero structural weight rating, cannot substitute for a safety cover
Heavier per square foot than an 8-mil cover, more work to remove and store

Prices and availability change, so confirm on Amazon.View on Amazon

Blue Wave NS420 16x32 Ft Rectangle Solar Pool Cover 12-Mil Blue

Blue Wave

12-mil thickness is the sweet spot between an 8-mil cover that tears too easily and a 16-mil cover that costs much more

12-mil UV-stabilized polyethylene bubbles
5-year seam warranty
16x32 ft rectangle fit
Raises water temperature 10-15°F
Cuts evaporation by up to 95%

Pros

12-mil thickness is the sweet spot between an 8-mil cover that tears too easily and a 16-mil cover that costs much more
5-year seam warranty beats most budget solar covers, which often carry no seam coverage at all
Nearly 3,200 ratings at 4.4 stars is a large enough sample to trust the durability claims
Fits standard 16x32 rectangular pools without custom cutting

Cons

Still a wear item, expect noticeable bubble degradation by year 4-5 even with the 5-year warranty
Needs a reel to handle without wrinkling or tearing at this size
Adds zero structural weight rating, cannot substitute for a safety cover
Heavier per square foot than an 8-mil cover, more work to remove and store

Prices and availability change, so confirm on Amazon.View on Amazon

FAQ

Common questions

Which is better, the WaterWarden Premium Pool Safety Cover for 12x20 Ft In-Ground Pool or the Blue Wave NS420 16x32 Ft Rectangle Solar Pool Cover 12-Mil Blue?

What is the difference between the WaterWarden Premium Pool Safety Cover for 12x20 Ft In-Ground Pool and the Blue Wave NS420 16x32 Ft Rectangle Solar Pool Cover 12-Mil Blue?

The WaterWarden Premium Pool Safety Cover for 12x20 Ft In-Ground Pool stands out because genuine weight-bearing barrier, not just a debris shieldand classified under ASTM F1346, while the Blue Wave NS420 16x32 Ft Rectangle Solar Pool Cover 12-Mil Blue stands out because 12-mil thickness is the sweet spot between an 8-mil cover that tears too easily and a 16-mil cover that costs much more. The trade-offs differ too: the WaterWarden Premium Pool Safety Cover for 12x20 Ft In-Ground Pool's ma in caveat is that requires a cover pump since rainwater and snowmelt pool on the solid surface, and the Blue Wave NS420 16x32 Ft Rectangle Solar Pool Cover 12-Mil Blue's is that still a wear item, expect noticeable bubble degradation by year 4-5 even with the 5-year warranty.

Is the WaterWarden Premium Pool Safety Cover for 12x20 Ft In-Ground Pool worth it over the Blue Wave NS420 16x32 Ft Rectangle Solar Pool Cover 12-Mil Blue?

For most buyers, yes: it's our #1 pick. Consider the Blue Wave NS420 16x32 Ft Rectangle Solar Pool Cover 12-Mil Blue instead if requires a cover pump since rainwater and snowmelt pool on the solid surface is a deal-breaker for you.