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Flex Saltwater Aquarium Kit, 32.5 US Gal / 123 L, Black

Item #: 14994 | UPC: 015561149945
Format: 32.5 L x 15.75 W x 15.35 H" (82 L x 40 W x 39 H cm)
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The Flex 32.5 US Gal / 123 L Saltwater Aquarium Kit makes an exciting addition to Fluval’s bold curved aquarium series. It comes equipped with a mobile device operated Marine 3.0 LED that offers total control over brilliant custom colors, multiple dynamic effects and a programmable 24-hour light timer. In addition, this all-new Flex includes a built-in filtration system with 2 independent multi-stage chambers for maximum cleaning efficiency.

  • Full spectrum Marine 3.0 LED operates via the FluvalSmart App on your mobile device
  • 25000 K color temperature lighting is ideal for growing vibrant corals
  • 3 pre-set lighting conditions: sunny reef; deep sea glo; color boost
  • 24-hour programmable light timer mimics the natural cycle of the sun and moon
  • Optional space to add a second Marine 3.0 LED (Item# 14513 – sold separately)
  • Powerful 3-stage filtration system
  • 2 independent media chambers for maximum, superior water quality
  • 2 oversized mechanical (foam); chemical (carbon); and biological (Biomax) media – all included
  • Twin output nozzles can be adjusted to create customized water flow
  • Hidden rear filter compartment provides separate media access and offers seamless integration of Fluval PS1 Protein Skimmer (Item# 14325 – sold separately) and M-150W Heater (Item# A783 – sold separately)
  • Convenient easy-feed door opening provides option to add PF2 programmable feeder (Item# L73310786 – sold separately)
  • Honeycomb print camouflages water line
  • Custom cabinetry available – Black (Item# 14985 – sold separately)
  • For saltwater use only
Item #
Aquarium Capacity32.5 US Gal
(123 L)
Wattage42 W
Lumens1800 lm
Color Temp.25 000 K
Pump Output214 US Gal/h
(810 L/h)
(L x W x H)
32.5 x 15.75 x 15.35"
(82 x 40 W x 39 cm)
  • Glass aquarium with cover
  • Marine 3.0 LED lighting system
  • Safe, low-voltage transformer
  • Circulation pump with output nozzle
  • 2 X Foam filter block with handle (Item# A1375)
  • 2 X Activated carbon insert (Item# A1377)
  • 2 X BioMax insert (Item# A1378)


2 Year Limited Warranty

Your Fluval FLEX aquarium and filter are guaranteed for defective parts and workmanship for a period of 2 years from the date of purchase. This guarantee is valid with proof of purchase only. The guarantee is limited to repair or replacement only and does not cover consequential loss or damage to animate or inanimate objects. This guarantee is valid provided the aquarium is placed in a suitable location that is flat and level and has been installed in accordance with the installation instructions and care guide. This guarantee excludes aquarium breakage due to misuse, chips, stress cracks caused by improper support or other breakage. This guarantee is valid only under normal operating conditions for which the unit is intended. It excludes any damage caused by unreasonable use, negligence, improper installation, tampering, abuse or commercial use. The warranty does not cover wear and tear or parts which have not been adequately or correctly maintained. THIS DOES NOT AFFECT YOUR STATUTORY RIGHTS.

FLEX 32 Saltwater2020-09-30T11:16:49-05:00



I’m new to the hobby. Do you offer any general strategies for maintaining a successful saltwater aquarium?

How do I remove algae in my aquarium that may be accumulating on the inside glass surface?

Whether it is visible or not, algae removal needs to be a regular weekly maintenance task. This is performed simply by going over the inner glass surface with a pad or an aquarium magnet, such as the Fluval Razor+ 2-in-1 Algae Magnet (Item #11083, 11084).

Can I add living coral to my tank after I’ve added cured rock?

Yes, but only if you have measured all key parameters (ammonia, nitrite, nitrate, phosphate, calcium, and alkalinity) and the results are favorable. We recommend including a few snails and blue leg hermit crabs to help deal with any potential algae growth.

What should I do if my pump output is weak?

Ensure that your water level is within the ideal range indicated in your instruction manual, which came with the product packaging or can be viewed on this website by visiting your aquarium product page. Additionally, ensure that the pump has been well cleaned.

Can I use this aquarium for freshwater?

You can, but please note that the light included with the aquarium is optimized for saltwater use.

Which protein skimmers fits in the rear compartment of the tank?

The Flex 32.5 US Gal. / 123 L has been designed to house the Fluval PS1 Protein Skimmer.

For optimal coral growth, should I add a circulation pump to my Flex aquarium?

We suggest consulting a reputable marine specialty retailer to identify the ideal conditions your coral species require. You can add a Fluval Sea CP circulation pump if you need additional water movement in your tank.

What kinds of corals can I keep in this tank?

Almost any coral can successfully be kept in a Flex 32.5 US Gal. / 123 L aquarium, although for species requiring higher light levels we suggest adding a second Marine 3.0 LED (Item #14513).

Why is the water level in the rear compartment housing the pump dropping more rapidly than the other compartments and the main portion of the tank?

Can I install a second LED unit into the lid of my Flex 32.5 US Gal. / 123 L?

You can! Either a second Marine 3.0 unit (Item #14549) or an Aquasky 2.0 (Item #14549) can be installed. Both these lights can be installed using the additional set of retention brackets included with the aquarium.

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