| Similarity | Rank | |
|---|---|---|
| fluval | 0.911 | 39608 |
| powerhead | 0.909 | 31085 |
| reverse-flow | 0.908 | 72940 |
| undergravel | 0.882 | 19259 |
| eheim | 0.875 | 68668 |
| algarde | 0.871 | 60722 |
| heaterstat | 0.865 | 47719 |
| anti-freeze | 0.861 | 79601 |
| autoclave | 0.861 | 58651 |
| draincock | 0.860 | 60890 |
| 3kw | 0.859 | 92049 |
| prefilter | 0.857 | 93972 |
| pre-filter | 0.857 | 46642 |
| self-cleaning | 0.856 | 89333 |
| fan-assisted | 0.853 | 93082 |
| airstone | 0.851 | 68094 |
| multi-point | 0.850 | 64459 |
| gravity-fed | 0.850 | 64437 |
| steriliser | 0.849 | 53784 |
| airpump | 0.847 | 69353 |
| flocor | 0.847 | 68145 |
| reducer | 0.847 | 57188 |
| polyfilter | 0.846 | 98846 |
| unvented | 0.844 | 58610 |
| thermostatic | 0.842 | 51536 |