Collection: Fluval Aquariums

Self-contained aquarium kits

These are all-in-one aquariums, meaning filtration lives in a rear chamber or behind an internal partition instead of a sump beneath the cabinet. Flex 2.0 is offered at 9 and 15 gallon with its curved front, while the original Flex remains at 32.5 gallon in freshwater and Sea saltwater versions. Sea EVO handles marine and reef duty at 5 and 13.5 gallon. Spec, Betta Premium and LIV Microscaping round out the smaller freshwater options.

Stands and media

• Flex stands at 15 and 32 gallon, built to the tank's footprint.
• Replacement carbon and BioMax shared across Spec, Evo and Flex.
• Foam blocks listed per model - Evo 13.5, Flex 15G and 9G.
• Poly-carb cartridges for the Flex 2.0 and the Betta kits.

Picking the right one

The rear chamber that keeps an all-in-one looking clean also limits what will fit behind the glass, so work out heater and pump placement before settling on the smallest tank. Media is the main ongoing consideration: several cartridges are visually similar but sized for a single model. Match the kit name on your box to the media listing before reordering.