| Answer | Crossword Clue |
|---|---|
| SCUM | Buildup in a fish tank |
| ALGAE | Fish tank buildup |
| TETRA | Fish in a tank |
| ALGA | Bit in a fish tank |
| ALGAE | Tank buildup |
| TETRA | Tank fish |
| AQUARIUM | Fish tank |
| TETRA | Fish-tank favorite |
| ALGAE | Fish tank gunk |
| ALGA | Fish tank organism |
| ALGAE | Fish tank film |
| TETRA | Flashy tank fish |
| ALGAE | Fish tank bane |
| ALGAE | Fish tank problem |
| TETRAS | 'Neon' tank fish |
| GUPPY | Popular tank fish |
| ALGAE | Fish-tank problem |
| GRAVEL | Fish tank flooring |
| TETRA | Fish tank favorite |
| TETRA | Colorful tank fish |
| AERATOR | Fish tank adjunct |
| ALGAE | Fish tank plant life |
| TETRA | Fish tank dweller, sometimes |
| TETRA | Tropical fish tank favorite |
| AERATE | Make the fish tank bubble |
