Rank #5 in Best Fish Tank 2026: 10 Ranked, £99.99 Buys 20 or 54 Litres
Fluval Flex 2.0 Aquarium Kit, 34 L, Black
Price and rating as shown on Amazon when we collected them. Both change.
The Fluval Flex 2.0 Black Aquarium Kit is the 34-litre tank in this guide: vertically bent glass at the front, adjustable LED lighting, filtration built into the rear section, a spray bar and customisable flow, sold as a complete kit for £99.99. It takes the number 5 spot, and it is the middle of three listings here that all cost exactly £99.99 — one holds 20 litres, this one 34, and the third 54. For identical money, the largest of the three holds 20 litres more than this tank.
Two details on this listing are worth flagging. Its Included Components run to a circulation pump, glass aquarium, LED light, power supply and spray bar — a heater is not on that list, and the tank is listed at 34 litres inside external dimensions of 35 x 34 x 33 cm. And two of the four reviews shown mention the LED remote arriving with no battery fitted, which is worth checking before deciding the light is faulty. Everything on this page is taken from the Amazon listing and its customer reviews, not from any test of ours.
How those 43 ratings break down
An average hides its own shape. This is the spread behind the 4.5 stars.
Specification
Exactly as published on the Amazon listing, field for field.
| Price | £99.99 |
|---|---|
| Customer rating | 4.5 out of 5 from 43 ratings |
| Tank Volume | 34 Litres |
| Item Dimensions L x W x H | 35L x 34W x 33H centimetres |
| Item Weight | 6.9 kg |
| Included Components | Circulation Pump, Glass Aquarium, LED Light, Power Supply, Spray Bar |
| Best Sellers Rank (as listed) | 25 in Aquariums |
| Product Warranty | 1 year |
What buyers actually say
Quoted from customer reviews on Amazon
Verified purchase“What a great replacement for my biome easy to put together and because all the workings filter etc are located at the back section easy to get at.The size I got is deceptively small but holds the same amount of water. The remote( no batteries supplied) has no 24 hr time unfortunately. The most important part... the fish love it and settled quickly with only one loss due to stress. Good value but not cheap and because the glass front to convexed it looks much bigger. Bought a glass cleaner to keep algae at bay”
Verified purchase“Excellent tank all you need is heater”
What it is up against
The rivals it was ranked against in Best Fish Tank 2026: 10 Ranked, £99.99 Buys 20 or 54 Litres.
Questions people ask
How much does the Fluval Flex 2.0 Black Aquarium Kit cost?
£99.99. In this guide that is the same price as a 20-litre tank and a 54-litre tank, so £99.99 buys between 20 and 54 litres depending on which of the three listings you choose.
What comes in the kit?
The listing's Included Components are the circulation pump, glass aquarium, LED light, power supply and spray bar. A heater is not among them.
How much water does it hold?
The Tank Volume field reads 34 Litres, the product name says 34 L, and the item dimensions are 35L x 34W x 33H centimetres.
Does the LED light need batteries?
The listing gives adjustable LED lighting and a power supply, but two of the four reviews shown on the page mention the remote turning up with no battery in it. Check the remote before assuming the light is faulty.
How is the Fluval Flex rated by buyers?
4.5 out of 5 from 43 ratings. Of those ratings, 82 per cent are five-star and 6 per cent are one-star.
Who makes it and what warranty is listed?
The brand is Fluval, the manufacturer is listed as Rolf C Hagen UK Ltd, the model number is 15050, and the product warranty is one year.
Comments
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