Across
- 6. where water is held before going back to fish tank
- 7. what converts ammonia to nitrite
- 9. cycle process where nutrients get converted
- 10. culture of growing fish
Down
- 1. what converts nitrite to nitrate
- 2. plants growing without soil
- 3. combines plants and aquaculture
- 4. where ammonia and nitite get converted
- 5. deadly and toxic for fish
- 8. nutrients plants can absorb