How to Fertilize Canadian pondweed?
Balanced feed in spring and light repeat in growth season

Canadian pondweed · Elodea canadensis
Also known as: 加拿大水草; American waterweed; choke pondweed; ditch moss; little snakeweed; water thyme
This plant is listed on Schedule 9 of the UK Wildlife & Countryside Act as an invasive non-native species. Although not banned from sale, it is an offence to plant or cause these to grow in the wild IN ENGLAND, WALES, NORTHERN IRELAND and the REPUBLIC OF IRELAND. Gardeners possessing them should undertake measures to control them. See RHS advice on invasive non-native species for further information
Balanced feed in spring and light repeat in growth season