20 models · Specs last checked July 2, 2026

Which aquarium uv sterilizer should you actually buy?

With no preferences selected: OASE Vitronic UV Clarifier 18W comes first in this spec comparison. None of these 20 has a verified Amazon listing yet, so this page ranks them on published specs only and has no Amazon buying links.

20 aquarium uv sterilizers compared.

No hands-on testingMethod and sources

The picks

Five options for different needs

Each option suits a different need. Bigger is useful only if it suits your setup.

Highest rank before your choices

OASE Vitronic UV Clarifier 18W

#1 of 20 in the spec comparison. 2,500 gal maximum tank · highest of 20 models; fresh salt: not included · 2 of 20 models have this.

Why consider it

2,500 gal maximum tank.
1,100 gph flow rate.

Before you choose

You need fresh salt; this model does not include it.

Buy it ifYou want 2,500 gal maximum tank.

Skip it ifYou need fresh salt; this model does not include it.

Compare it withLifegard Aquatics Pro-MAX UV Sterilizer 25W: fresh salt is included, compared with Not included here.

Max Tank: 2,500 galFlow Rate: 1,100 gphInline Or Internal: Inline Pond

See all 7 scored specs

Max Tank2,500 gal

Flow Rate1,100 gph

Inline Or InternalInline Pond

Wattage18 W

Fresh SaltNot included

Housing MaterialPlastic

Lamp TypeUV C

7 of 7 specs available · specs checked July 2, 2026 · Source ↗

No verified listing yet — check the maker's site for this model.

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For Up to 75 gal maximum tank

Aqua Ultraviolet Advantage 8 Watt UV Sterilizer

#9 of 20 in the spec comparison. 642 gph flow rate · 5th highest of 20 models; 8 W wattage · 19th highest of 20 models.

Why consider it

642 gph flow rate.
8 W wattage.

Before you choose

For your setup, check maximum tank: 75 gal.

Buy it ifYou want 642 gph flow rate.

Skip it ifYou need a different option for maximum tank; this model has 75 gal.

Compare it withOASE Vitronic UV Clarifier 18W: 2,500 gal maximum tank, compared with 75 gal here.

Max Tank: 75 galFlow Rate: 642 gphInline Or Internal: Inline

See all 7 scored specs

Max Tank75 gal

Flow Rate642 gph

Inline Or InternalInline

Wattage8 W

Fresh SaltIncluded

Housing MaterialPlastic

Lamp TypeUV C

7 of 7 specs available · specs checked July 2, 2026 · Source ↗

No verified listing yet — check the maker's site for this model.

Compare

For Up to 200 gph flow rate

AA Aquarium Green Killing Machine Internal UV

#6 of 20 in the spec comparison. 24 W wattage · 2nd highest of 20 models; fresh salt: included · 18 of 20 models have this.

Why consider it

24 W wattage.
Fresh salt: included; choose it if you require that feature.

Before you choose

For your setup, check maximum tank: 120 gal.

Buy it ifYou want 24 W wattage.

Skip it ifYou need a different option for maximum tank; this model has 120 gal.

Compare it withOASE Vitronic UV Clarifier 18W: 2,500 gal maximum tank, compared with 120 gal here.

Max Tank: 120 galFlow Rate: 200 gphInline Or Internal: Internal

See all 7 scored specs

Max Tank120 gal

Flow Rate200 gph

Inline Or InternalInternal

Wattage24 W

Fresh SaltIncluded

Housing MaterialPlastic

Lamp TypeUV C

7 of 7 specs available · specs checked July 2, 2026 · Source ↗

No verified listing yet — check the maker's site for this model.

Compare

For Inline filter placement

Lifegard Aquatics Pro-MAX UV Sterilizer 25W

#2 of 20 in the spec comparison. 1,200 gph flow rate · highest of 20 models; 25 W wattage · highest of 20 models.

Why consider it

1,200 gph flow rate.
25 W wattage.

Before you choose

For your setup, check maximum tank: 150 gal.

Buy it ifYou want 1,200 gph flow rate.

Skip it ifYou need a different option for maximum tank; this model has 150 gal.

Compare it withOASE Vitronic UV Clarifier 18W: 2,500 gal maximum tank, compared with 150 gal here.

Max Tank: 150 galFlow Rate: 1,200 gphInline Or Internal: Inline

See all 7 scored specs

Max Tank150 gal

Flow Rate1,200 gph

Inline Or InternalInline

Wattage25 W

Fresh SaltIncluded

Housing MaterialPVC

Lamp TypeUV C

7 of 7 specs available · specs checked July 2, 2026 · Source ↗

No verified listing yet — check the maker's site for this model.

Compare

For Internal Filter filter placement

SunSun JUP-02 Internal UV Sterilizer Filter

#10 of 20 in the spec comparison. 13 W wattage · 8th highest of 20 models; filter placement: Internal Filter · 3 of 20 models have this.

Why consider it

13 W wattage.
Filter placement: Internal Filter.

Before you choose

For your setup, check maximum tank: 100 gal.

Buy it ifYou want 13 W wattage.

Skip it ifYou need a different option for maximum tank; this model has 100 gal.

Compare it withOASE Vitronic UV Clarifier 18W: 2,500 gal maximum tank, compared with 100 gal here.

Max Tank: 100 galFlow Rate: 264 gphInline Or Internal: Internal Filter

See all 7 scored specs

Max Tank100 gal

Flow Rate264 gph

Inline Or InternalInternal Filter

Wattage13 W

Fresh SaltIncluded

Housing MaterialPlastic

Lamp TypeUV C

7 of 7 specs available · specs checked July 2, 2026 · Source ↗

No verified listing yet — check the maker's site for this model.

Compare

Comparing OASE Vitronic UV Clarifier 18W · Lifegard Aquatics Pro-MAX UV Sterilizer 25W

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Keep your decision

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The facts that differ

Choose up to three. Facts stay neutral; your choices determine fit.

Differences only

1 identical specs hidden. Non-applicable dimensions are omitted.

Published specification comparison
Spec	OASE Vitronic UV Clarifier 18WNo preferences selected.	Lifegard Aquatics Pro-MAX UV Sterilizer 25WNo preferences selected.
Max Tank	2,500 gal	150 gal
Flow Rate	1,100 gph	1,200 gph
Inline Or Internal	Inline Pond	Inline
Wattage	18 W	25 W
Fresh Salt	Not included	Included
Housing Material	Plastic	PVC

OASE Vitronic UV Clarifier 18W

No preferences selected.

Max Tank: 2,500 gal
Flow Rate: 1,100 gph
Inline Or Internal: Inline Pond
Wattage: 18 W
Fresh Salt: Not included
Housing Material: Plastic

Lifegard Aquatics Pro-MAX UV Sterilizer 25W

No preferences selected.

Max Tank: 150 gal
Flow Rate: 1,200 gph
Inline Or Internal: Inline
Wattage: 25 W
Fresh Salt: Included
Housing Material: PVC

OASE Vitronic UV Clarifier 18W

No verified listing yet.

Lifegard Aquatics Pro-MAX UV Sterilizer 25W

No verified listing yet.

All 20 models, with reasons

— = no verified listing yet. The published order is independent of links.

All models and their decision specs
#	Product	Why it’s here	Decision specs	Compare	Action
1	OASE Vitronic UV Clarifier 18W	2,350 gal more maximum tank vs #2.	Max Tank: 2,500 galFlow Rate: 1,100 gphInline Or Internal: Inline Pond	Compare	—
2	Lifegard Aquatics Pro-MAX UV Sterilizer 25W	500 gph more flow rate · 7 W more wattage vs #3.	Max Tank: 150 galFlow Rate: 1,200 gphInline Or Internal: Inline	Compare	—
3	Pentair Smart UV Sterilizer 18W	3 W more wattage vs #4.	Max Tank: 150 galFlow Rate: 700 gphInline Or Internal: Inline	Compare	—
4	Aqua Ultraviolet Advantage 15 Watt UV Sterilizer	300 gph more flow rate vs #5.	Max Tank: 200 galFlow Rate: 700 gphInline Or Internal: Inline	Compare	—
5	Coralife Turbo-Twist UV Sterilizer 6X	130 gal more maximum tank · 200 gph more flow rate vs #6.	Max Tank: 250 galFlow Rate: 400 gphInline Or Internal: Inline Hang On	Compare	—
6	AA Aquarium Green Killing Machine Internal UV	15 W more wattage vs #7.	Max Tank: 120 galFlow Rate: 200 gphInline Or Internal: Internal	Compare	—
7	OASE Vitronic UV Clarifier 9W	890 gal more maximum tank · 250 gph more flow rate vs #8.	Max Tank: 1,000 galFlow Rate: 600 gphInline Or Internal: Inline Pond	Compare	—
8	TMC Vecton UV Sterilizer 15W	35 gal more maximum tank · 7 W more wattage vs #9.	Max Tank: 110 galFlow Rate: 350 gphInline Or Internal: Inline	Compare	—
9	Aqua Ultraviolet Advantage 8 Watt UV Sterilizer	378 gph more flow rate vs #10.	Max Tank: 75 galFlow Rate: 642 gphInline Or Internal: Inline	Compare	—
10	SunSun JUP-02 Internal UV Sterilizer Filter	64 gph more flow rate · 4 W more wattage vs #11.	Max Tank: 100 galFlow Rate: 264 gphInline Or Internal: Internal Filter	Compare	—
11	Coralife Turbo-Twist UV Sterilizer 3X	50 gal more maximum tank vs #12.	Max Tank: 125 galFlow Rate: 200 gphInline Or Internal: Inline Hang On	Compare	—
12	SunSun JUP-01 Internal UV Sterilizer Filter	2 W more wattage vs #13.	Max Tank: 75 galFlow Rate: 210 gphInline Or Internal: Internal Filter	Compare	—
13	Hygger Aquarium UV Filter 7W	25 gal more maximum tank · 110 gph more flow rate vs #14.	Max Tank: 75 galFlow Rate: 210 gphInline Or Internal: Internal Filter	Compare	—
14	Aqua Ultraviolet Classic 25 Watt UV Sterilizer	#14 of 20 in the spec comparison. filter placement: Internal · 8 of 20 models have this; fresh salt: included · 18 of 20 models have this.	Max Tank: 50 galFlow Rate: 100 gphInline Or Internal: Internal	Compare	—
15	Hygger 13W Aquarium UV Filter	#15 of 20 in the spec comparison. filter placement: Internal · 8 of 20 models have this; fresh salt: included · 18 of 20 models have this.	Max Tank: 50 galFlow Rate: 100 gphInline Or Internal: Internal	Compare	—
16	AA Aquarium AAUV9W	#16 of 20 in the spec comparison. 100 gph flow rate · joint 15th highest of 20 models; filter placement: Internal · 8 of 20 models have this.	Max Tank: 50 galFlow Rate: 100 gphInline Or Internal: Internal	Compare	—
17	JBJ Submariner UV Sterilizer 9W	6 gph more flow rate vs #18.	Max Tank: 50 galFlow Rate: 106 gphInline Or Internal: Internal	Compare	—
18	OASE ClearTronic 7W UVC Clarifier	#18 of 20 in the spec comparison. filter placement: Internal · 8 of 20 models have this; fresh salt: included · 18 of 20 models have this.	Max Tank: 50 galFlow Rate: 100 gphInline Or Internal: Internal	Compare	—
19	AA Aquarium AAUV3W	#19 of 20 in the spec comparison. filter placement: Internal · 8 of 20 models have this; fresh salt: included · 18 of 20 models have this.	Max Tank: 50 galFlow Rate: 100 gphInline Or Internal: Internal	Compare	—
20	Fluval UVC In-Line Clarifier	#20 of 20 in the spec comparison. 50 gal maximum tank · joint 14th highest of 20 models; 100 gph flow rate · joint 15th highest of 20 models.	Max Tank: 50 galFlow Rate: 100 gphInline Or Internal: Internal	Compare	—

#1 OASE Vitronic UV Clarifier 18W

2,350 gal more maximum tank vs #2.

Max Tank: 2,500 galFlow Rate: 1,100 gphInline Or Internal: Inline Pond

Compare—

#2 Lifegard Aquatics Pro-MAX UV Sterilizer 25W

500 gph more flow rate · 7 W more wattage vs #3.

Max Tank: 150 galFlow Rate: 1,200 gphInline Or Internal: Inline

Compare—

#3 Pentair Smart UV Sterilizer 18W

3 W more wattage vs #4.

Max Tank: 150 galFlow Rate: 700 gphInline Or Internal: Inline

Compare—

#4 Aqua Ultraviolet Advantage 15 Watt UV Sterilizer

300 gph more flow rate vs #5.

Max Tank: 200 galFlow Rate: 700 gphInline Or Internal: Inline

Compare—

#5 Coralife Turbo-Twist UV Sterilizer 6X

130 gal more maximum tank · 200 gph more flow rate vs #6.

Max Tank: 250 galFlow Rate: 400 gphInline Or Internal: Inline Hang On

Compare—

#6 AA Aquarium Green Killing Machine Internal UV

15 W more wattage vs #7.

Max Tank: 120 galFlow Rate: 200 gphInline Or Internal: Internal

Compare—

#7 OASE Vitronic UV Clarifier 9W

890 gal more maximum tank · 250 gph more flow rate vs #8.

Max Tank: 1,000 galFlow Rate: 600 gphInline Or Internal: Inline Pond

Compare—

20 matching models

How we rank and where the facts come from

We compare published specifications, not hands-on experience. Requirements filter the set; the sealed published order is unchanged. The index uses fixed weights and gives missing specs a midpoint. That is an assumption, not evidence of fit or quality. Unknown details cannot qualify a match.

What changed: specs in this snapshot were checked July 2, 2026. This package includes no prior spec revision; changes to individual values cannot be established.

Full methodology Report a correction

Sources for all 20 models

OASE Vitronic UV Clarifier 18W: OASE ↗ · July 1, 2026
Lifegard Aquatics Pro-MAX UV Sterilizer 25W: Lifegard Aquatics ↗ · July 1, 2026
Pentair Smart UV Sterilizer 18W: Pentair Aquatic Eco-Systems ↗ · July 1, 2026
Aqua Ultraviolet Advantage 15 Watt UV Sterilizer: Aqua Ultraviolet ↗ · July 1, 2026
Coralife Turbo-Twist UV Sterilizer 6X: Coralife ↗ · July 1, 2026
AA Aquarium Green Killing Machine Internal UV: AA Aquarium ↗ · July 1, 2026
OASE Vitronic UV Clarifier 9W: OASE ↗ · July 1, 2026
TMC Vecton UV Sterilizer 15W: Tropical Marine Centre ↗ · July 1, 2026
Aqua Ultraviolet Advantage 8 Watt UV Sterilizer: Aqua Ultraviolet ↗ · July 1, 2026
SunSun JUP-02 Internal UV Sterilizer Filter: Aquarium Co-Op ↗ · July 1, 2026
Coralife Turbo-Twist UV Sterilizer 3X: Coralife ↗ · July 1, 2026
SunSun JUP-01 Internal UV Sterilizer Filter: Aquarium Co-Op ↗ · July 1, 2026
Hygger Aquarium UV Filter 7W: Hygger ↗ · July 1, 2026
Aqua Ultraviolet Classic 25 Watt UV Sterilizer: Aqua Ultraviolet ↗ · July 1, 2026
Hygger 13W Aquarium UV Filter: Hygger ↗ · July 1, 2026
AA Aquarium AAUV9W: AA Aquarium ↗ · July 1, 2026
JBJ Submariner UV Sterilizer 9W: JBJ Aquariums ↗ · July 1, 2026
OASE ClearTronic 7W UVC Clarifier: OASE ↗ · July 1, 2026
AA Aquarium AAUV3W: AA Aquarium ↗ · July 1, 2026
Fluval UVC In-Line Clarifier: Fluval ↗ · July 2, 2026

Show the index and published weights

Weights: Max Tank 24% · Flow Rate 20% · Inline Or Internal 15% · Wattage 14% · Fresh Salt 10% · Housing Material 9% · Lamp Type 8%.

OASE Vitronic UV Clarifier 18W: 79/100
Lifegard Aquatics Pro-MAX UV Sterilizer 25W: 71/100
Pentair Smart UV Sterilizer 18W: 56/100
Aqua Ultraviolet Advantage 15 Watt UV Sterilizer: 55/100
Coralife Turbo-Twist UV Sterilizer 6X: 53/100
AA Aquarium Green Killing Machine Internal UV: 49/100
OASE Vitronic UV Clarifier 9W: 48/100
TMC Vecton UV Sterilizer 15W: 47/100
Aqua Ultraviolet Advantage 8 Watt UV Sterilizer: 47/100
SunSun JUP-02 Internal UV Sterilizer Filter: 43/100
Coralife Turbo-Twist UV Sterilizer 3X: 41/100
SunSun JUP-01 Internal UV Sterilizer Filter: 39/100
Hygger Aquarium UV Filter 7W: 37/100
Aqua Ultraviolet Classic 25 Watt UV Sterilizer: 35/100
Hygger 13W Aquarium UV Filter: 35/100
AA Aquarium AAUV9W: 35/100
JBJ Submariner UV Sterilizer 9W: 35/100
OASE ClearTronic 7W UVC Clarifier: 35/100
AA Aquarium AAUV3W: 35/100
Fluval UVC In-Line Clarifier: 35/100

Before you buy

Why do some picks have no buy link?

Only exact models with verified Amazon listings receive links. Other models keep their place. A link does not establish current stock or price.

Does the highest rank mean the right product for me?

Start with your requirements, then compare the recorded differences. The published order reflects one set of weights, which may differ from your priorities.

What should I confirm before ordering?

Check the exact model, compatibility, current price and return terms. Published specs do not establish reliability, noise, comfort or ownership experience.