Fluval Flex 9
Fluval Flex 9 is a 34 × 33 × 33 cm (13.4 × 13 × 13 in) aquarium, rated at 34 L (9 gal). Its footprint is 34 × 33 cm and the water stands about 27 cm deep once a 6 cm substrate layer is in — the two numbers that decide what you can plant in it and what you can stock it with.
At a glance
| Size | 34 × 33 × 33 cm (13.4 × 13 × 13 in) |
|---|---|
| Volume | 34 L (9 gal), as sold |
| Water after substrate | About 28 L (7 gal) with a 6 cm substrate layer |
| Footprint | 34 × 33 cm (13.4 × 13 in) |
| Water depth | 27 cm (10.6 in) |
| Substrate needed | About 7 L for a 6 cm layer |
Before it goes in
- Fluval Flex 9 is 34 × 33 × 33 cm (13.4 × 13 × 13 in) — rated at 34 L (9 gal), and roughly 28 L (7 gal) of actual water once a 6 cm substrate layer and the hardscape are in.
- That layer takes about 7 L of substrate, which is what you order by.
- 21 of the 160 animals in this library list a minimum tank at or under 34 L (9 gal). The biggest of them that still fit are Ember Tetra and Chili Rasbora. African Dwarf Frog and African Clawed Frog need more than this.
- The water sits about 27 cm (10.6 in) deep over the substrate. Plants that get taller than that — Hygrophila corymbosa 'Siamensis' and Water Sprite — reach the surface and start growing along it, which is a look you either want or trim.
- Its footprint is 34 × 33 cm, and that is the area a carpet has to cover — the number that decides how many pots you buy, not the volume.
What are its dimensions?
34 × 33 × 33 cm (13.4 × 13 × 13 in).
How much water does it hold?
It is sold as 34 L (9 gal), and roughly 28 L (7 gal) of actual water once the substrate is in. Stocking works off the second number; minimum-tank-size advice works off the first.
How much substrate does it take?
About 7 L for a 6 cm layer.
What fits in it?
21 of the 160 animals in this library list a minimum tank at or under its volume, and the water depth of about 27 cm sets which plants can grow without reaching the surface.
What fits in it
- Animals this size will hold: Chili Rasbora, Endlers, Sparkling Gourami, Ember Tetra and Phoenix Rasbora.
- Plants that stay under its water line: Anubias nana 'Petite', Cryptocoryne wendtii, Dwarf Hairgrass Mini and Frogbit.
Often compared with
| Fluval Flex 9 | Eheim Aquastyle 35 | 60F Shallow | |
|---|---|---|---|
| Size | 34 × 33 × 33 cm | 31 × 31 × 36 cm | 60 × 30 × 18 cm |
| Volume | 34 L | 35 L | 32 L |
| Footprint | 34 × 33 cm | 31 × 31 cm | 60 × 30 cm |
| Water depth | 27 cm | 30 cm | 12 cm |