What's wrong with this rotala? Is it (a) ferts, (b) CO2, (c) something else?

(Apologies for crap iPhone photos)

Have HC and stauro growing fine about an inch from this plant, so suspect it's not CO2. Dosing EI (Aquarium Plant Food trace mix) and pressurised inline CO2, and everything else is fine, plus yellow drop checker on CO2, and only shrimp in the tank.
Looks sort of like a deficiency to me. Is sort of similar in my other tank too, which is getting the same dosing. All other plants are healthy.
Also, this is an amazing fert / deficiency chart:
http://www.finostrom.com.gr/images/aqua ... rs/map.htm
Thanks!

(Apologies for crap iPhone photos)

Have HC and stauro growing fine about an inch from this plant, so suspect it's not CO2. Dosing EI (Aquarium Plant Food trace mix) and pressurised inline CO2, and everything else is fine, plus yellow drop checker on CO2, and only shrimp in the tank.
Looks sort of like a deficiency to me. Is sort of similar in my other tank too, which is getting the same dosing. All other plants are healthy.
Also, this is an amazing fert / deficiency chart:
http://www.finostrom.com.gr/images/aqua ... rs/map.htm
Thanks!