| Be sure to include submergent plants such as common waterweed and hornwort for their high oxygen output. |
|
| Mr Mather is now concerned boaties might accidentally transfer hornwort from Lake Rotoehu into nearby Rotoma, which does not have it. |
|
| For the record, I've got water moss, hornwort, frog bit and, everyone's favourite, the lovely water violet. |
|
| Get yourself a selection which may include water moss, hornwort, the lovely water violet, frogbit and some milfoil, which spreads nicely. |
|
| And finally, add in native oxygenating plants, such as hornwort. |
|
| I would recommend Hornwort, Willow moss and Water buttercup, as all are easy to keep in check. |
|
