I want to find something small that I can put on one side of my Low-light 5.5G shrimp/snail tank. I'm looking for something rooted in the substrate. My water parameters are: pH >7, mild hardness, temp around 77F. I currently dose with Flourish & Flourish Excel 1x/week with my WCs. Originally I was thinking of crypt wendtii or vallisneria spiralis. Would these work alright, or do you have any other ideas?