I am using glosso now and it's fairly quick, that and the eleocharis species seem to work well for me. I have E. flavescens and E. acicularis and both grow pretty well under medium light with no CO2.
I use Fluval Shrimp Stratum but i would recommend against it. I got it for free on this forum and it works well for me since SF tap water is very good for plants and shrimp. However when planting, it's so light that it has trouble holding down the plants unless i pull the roots deep down.