# Fluval Flex 2.0 Aquarium Kit, 57 L, Black

Source: https://www.ranked10.co.uk/pet-supplies/best-fish-tanks/fluval-flex-2-57-litre
Ranked #2 in "Best Fish Tank 2026: 10 Ranked, £99.99 Buys 20 or 54 Litres": https://www.ranked10.co.uk/pet-supplies/best-fish-tanks

- Price: £129.99 (checked on Amazon UK on 2026-09-16)
- Amazon rating: 4.6 from 55 ratings
- Buy on Amazon: https://www.amazon.co.uk/dp/B0FQP5XD64?tag=ranked10-21

The Fluval Flex 2.0 Black Aquarium Kit 57 L comes in at number two in this guide, and it is the one tank here priced above the £99.99 trio: £129.99, thirty pounds more than the cheapest of them, for 57 litres. Put another way, this listing works out at roughly £2.28 per litre, while the 20-litre tank sold at £99.99 in the same set works out at about £5.00 per litre. On the numbers in the ads alone, the extra £30 here buys water rather than a badge.

The figure that separates this listing from the rest of the set is the weight. The specification table gives an item weight of 13.2 kg for a 57-litre aquarium measuring 41.5 x 40 x 39 cm — a weight that could plausibly belong to a glass tank sitting on a shelf. Two other listings in this guide give 200 g for a 60-to-70-litre tank and 136 g for a 20-litre one, which cannot be the tank itself. The Fluval listing carries its own loose end, too: the star breakdown supplied with it adds up to 100 ratings while the same listing states 55 ratings, and its Special Features field reads 'Weather Resistant' on a table that also says the tank is for Indoor use. Everything on this page is taken from the Amazon listing as written; we have not tested or measured this tank ourselves.

## Specification

| Field | Value |
|---|---|
| Price | £129.99 |
| Rating | 4.6 out of 5 from 55 ratings |
| Tank Volume | 57 litres |
| Item Dimensions | 41.5 x 40 x 39 cm (L x W x H) |
| Item Weight | 13.2 kg |
| Included Components | Circulation pump, glass aquarium, LED light, power supply, spray bar |
| Best Sellers Rank | 11,788 in Pet Supplies; 5 in Aquariums |
| Special Features (as listed) | Weather Resistant |

## Questions people ask

**How much water does the Fluval Flex 2.0 Black Aquarium Kit hold?**

The specification table on the Fluval listing gives a Tank Volume of 57 litres, with item dimensions of 41.5 x 40 x 39 cm.

**What is included with the Fluval Flex 2.0?**

The listing's Included Components field names a circulation pump, glass aquarium, LED light, power supply and spray bar.

**How much does the Fluval Flex 2.0 cost?**

£129.99, which is £30 more than the £99.99 listings elsewhere in this guide.

**What rating does the Fluval Flex 2.0 have?**

4.6 out of 5 from 55 ratings as stated on the listing, with a Best Sellers Rank of 5 in Aquariums within Pet Supplies.

**Is the Fluval Flex 2.0 for indoor use?**

The listing's Specific Uses For Product field says Indoor and its Vivarium Type says Aquarium, while the same table puts Weather Resistant under Special Features — that is what the ad says, not something we measured.

**How heavy is the Fluval Flex 2.0?**

The listing gives 13.2 kg, a figure that fits a 57-litre glass tank, unlike the 200 g and 136 g weights given for other tanks in this guide.