Fluval Flex LED Aquasky Marine 3.0 Light 123ltr 21w
Wattage
42 W
Water type
Marine
Fits
Fluval Flex 32.5 US Gal (123 L) Aquarium
Part no.
14513
Warranty
3 years
Colour temp
25000K
Fluval Flex LED Aquasky Marine 3.0 Light 123ltr 21w
Genuine replacement Marine 3.0 LED for the Fluval Flex 123 L. This is the factory saltwater lighting unit for the Fluval Flex 32.5 US Gal (123 L) aquarium – a 42 W, full-spectrum fixture built for reef and fish-only marine tanks, controlled from the FluvalSmart app over Bluetooth.
A note on the wattage in this page's title: Fluval's own specifications for this exact unit (Item 14513, matching this product's barcode) list it at 42 W with 252 LEDs, not the 21 W shown in the title – which appears to have carried over from the freshwater Aquasky sibling for the same tank. We've used Fluval's figure below and flagged the title for review.
Key features
- 42 W full-spectrum LED array – 252 LEDs, rated 1,800 lumens at a 25,000K colour temperature suited to reef and marine viewing.
- Three preset modes – Sunny Reef, Deep Sea Glo and Colour Boost, selectable from the app.
- FluvalSmart app control – Bluetooth control of colour, intensity and scheduling; no separate controller needed.
- 24-hour programmable cycle – automatic sunrise-to-sunset ramping once set.
- 50,000-hour rated LED lifetime and a 3-year manufacturer warranty.
- Direct-fit replacement – genuine Fluval part, drops into the existing Flex 123 L lid.
Specifications
| Spec | Value |
|---|---|
| Wattage | 42 W |
| LED count | 252 |
| Light output | 1,800 lumens |
| Colour temperature | 25,000K |
| Rated LED lifetime | 50,000 hours |
| Fits | Fluval Flex 32.5 US Gal (123 L) aquarium |
| Control | Bluetooth via FluvalSmart app |
| Warranty | 3 years, manufacturer |
Fluval has not published a PAR-at-depth chart for this compact, one-piece fixture, so no light-intensity-by-depth table is included here. If you're keeping high-light SPS coral and want a measured PAR figure at your tank's depth, ask us before relying on wattage or lumens alone – neither is a reliable proxy for usable coral light.
Will it fit my tank?
Sized specifically for the Flex 32.5 US Gal (123 L) saltwater aquarium and its lid. It does not fit the Flex 34 L or 57 L.
What's included, and what you'll still need
This listing is the LED lamp unit only. The power supply is not included – Fluval sells the Flex power adaptor separately. If your existing transformer still works, you only need the lamp; if it doesn't, order both.
Suitable for, and not suitable for
Suitable for fish-only and reef marine Flex 123 L tanks, including soft coral and LPS under normal placement. Not verified for demanding SPS coral without a measured PAR reading at your coral's depth – see the note above.
Care and maintenance
Wipe the lens with a soft, dry cloth. Salt creep on the lens or vents reduces output over time and traps heat – check and clean it as part of your normal tank maintenance.
Safety
Mains-powered via the Flex's transformer (240 V / 50 Hz AU supply). Disconnect power before removing the lamp for cleaning, and don't operate it with a cracked lens or exposed wiring near a saltwater system.
Warranty and delivery
Three years from date of purchase against manufacturing defects (proof of purchase required), in addition to your rights under Australian Consumer Law. Fluval's warranty excludes consequential loss, including livestock loss. Standard freight applies.
Common questions
Is this 21 W or 42 W?
42 W – see the note above. The 21 W in this page's title matches the freshwater Aquasky sibling for the same tank, not this marine unit.
Does it come with the power supply?
No – this is the LED lamp only. Check your existing Flex 123 L transformer works before ordering; it's a separate part if it has failed.
Will this grow SPS coral?
It suits soft coral and LPS at normal placement. For SPS, we'd want a measured PAR figure at your coral's depth before recommending it – ask us and we'll help you check.
Is this the freshwater version?
No. This is the Marine 3.0 unit for saltwater tanks. The freshwater equivalent is the Fluval Aquasky, sold separately.
