Also called fairy moss, there tiny plantlets form a green, mossy, fern-like floating carpet on the water's surface.

Azolla

(Azolla caroliniana)

Easy growing aquatic ground cover with tiny, tear-drop shaped leaves.  Requires good light to thrive.  Only grows 2-3

Glossostigma

(Glossostigma elatinoides)

Very small bright green floating leaves. Rampant grower, and an excellent form of fish food.

Duckweed

(Lemna minor)

Slow-growing moss with erect evergreen-type leaves that creep along tank bottoms or overlook rocks/wood.

Java Moss

(Vesicularia dubyana)

A hardy surface floater with tiny, fuzzy, round leaves.

Salvinia

(Salvinia rotundifolia minima)

Slow-growing moss with erect evergreen-type leaves that creep along tank bottoms or overlook rocks/wood.

Willow Moss

(Fontinalis antipyretica)

Creeping foreground plant covering the substrate in a carpet of tiny, light green leaves on short running stems. Only grows 2-3

Baby Tears

(Micranthemum umbrosom)

Tiny, teardrop leaves on barely visible stems that grow in clusters forming a dense carpet only 1.5-3'' tall.

Baby Tears, Dwarf

 

(Hemianthus callitrichoides)

An easy growing aquatic groundcover, with tiny leaves on a short stem. Glossostigma requires good light to thrive.
This is a creeping plant that grows on rocks, driftwood, etc. It thrives in dim light and likes warm temperatures.

PORTION CUPS