Tall plants for super low light?

[UntimelyLord]

I have a 30 gallon tall tank (24 inches deep) with a single T5 light (15 watts) with reflector and gravel substrate and have been managing to grow anubias and Java fern and float anacharis. I would like to know if there is a plant that can survive in these conditions that could reach to the top of my tank (24 inches). I've been trying to search around but when most people think low light, it's better than what I have! The tank does get some indirect sunshine. I have some tall anubias species but they are about 12 inches and the top half of my tank looks bare! I'm trying to let the anacharis grow tall while floating (closer to the light) and then I'll try weighing that down. But is there anything else? Would water wisteria survive? Valisneria? Which species?

 

[flchamp89]

Wisteria and vals were exactly what I was thinking. Sprite would be another.

 

[UntimelyLord]

Thanks, sounds good

 

[Delapool]

Foxtail has done ok for me in low light. The fine leaves can be messy sometimes though.