Since I am not sure what size tank you are referring to or to its light level, here are just some "small, red" plants. Some are harder to acquire than others but the options are there.
Alternanthera spp.
Ammannia multiflora
Ammannia sp. 'Bonsai'
Blyxa japonica
Bacopa sp. 'Red'
Bacopa sp. 'Purple'
Cryptocoryne pygmaea
Cryptocoryne x willisii
Didiplis diandra
Echinodorus tenellus 'Micro'
Juncus repens
Ludwigia arcuata
Ludwigia arcuata x repens
Ludwigia brevipes
Myriophyllum matogrossense 'Red'
Najas sp. 'Red'
Potamogeton gayi
Proserpinaca palustris
Ranalisma humile
Rotala macranda 'Green'
Rotala macranda 'Narrow Leaf' (
Rotala magenta)
Rotala macranda 'Small Leaf'
Rotala pussila
Rotala rotundifolia
Rotala rotundifolia 'Colorata'
Rotala sp. 'Pearl'
Rotala sp. 'Vietnam'
Rotala wallichii
...not to mention some of the larger red plants that, with some judicious and clever prunings, can be fitted into smaller tanks (i.e.
Pogostemon stellatus).
fishfry said:
How about Hygrophila sp. "red", also called Hygrophila sp. "Amazon" I think.
Hygrophila sp. 'Red' is a HUGE plant. The longest leaf on my plant is about 8-10" long. The Plant Finder says that it is a creeping plant but mine often grows vertically, even under very high light. I have no idea why it is doing that.