Yeah so I will raise the light some more and do more tea search on EI dosing.
I would leave your light where it is. It is just a little brighter than mine is over my 29G. The rotala will have better color with the light as it is.
For ferts I would just add Seachem iron for the rotala to get more pink in the leaves. The crypts could use some API root tabs. Cheapest here
. No need for the EI fert plan for the plants that you have.
Why not put the co2 tube below the intake of the filter? That is what I have read that many do. Also can put it in the into a powerhead.