i have a five foot planted tank with sword/indan fern/cryps/ im looking for a plant i can float on the surface that wont block all the ligth out.any i dears .

cheers ant.

All floating plant will block the light to some extent.

but there must be some kind that will grow as one plant in steed of like duck weed which grows ever where.

or so plant like a water lilly but can be floated any idears.

Riccia fluitans, azola rubra, banana plant , Indian fern, lotus and vallisneria come to mind.

Hydrocotyle is good - medium-sized round leaves. It will cover but can be trimmed or pulled very easily.

Cardamine lyrata also.

if you can keep duckweed under control it does make a good floating plant...it's been proven to release antibiotics into the water and, based on the colour and size of its leaves, can indicate the quality of the water for growing plants.

ok how do you keep duckweed in one place as iv got heaps in a pond.as the area in whant to cover is in the middle of the tank as iv got other plants growing on the outer edges, cheers ant

a floating ring