Fast growing, low light plants

I have tried vals but they never grow...huh...dont know why..I also tried java moss and other mosses they grow but the african make a mess of it....I have anachris in my tank right know but they dont mess with it....I wanted fast growing plants to suck up all the nutrients....
 
Low light about 1 wpg (.72-1.25ish)
Moderate/medium light about 2 wpg (1.5-2.5ish)
High light about 3 wpg (over 2.5 up to about 4ish)
 
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