ALGAL
| Date | Clue |
|---|---|
| 2019-07-24 | Like pond scum |
| 2016-12-11 | ___ bloom (result of fertilizer pollution) |
| 2016-07-11 | Like some pond growths |
| 2014-12-02 | Harmful ___ bloom (aquatic growth) |
| 2009-07-14 | Like some pond life |
| 2006-07-31 | Like pond scum |
| 2000-03-12 | Like some pond life |