Which plants have gotten transparent/stringy? How long have you had the plants in the tank? Some plants go into shock when they are first put into a tank or get moved around.
The fertilizer stick will help your sword plant, but it will need light to photosynthesize & utilitize the ferts.
I saw "frill" identified on another thread - I believe that's egeria densa aka anacharis aka waterweed http://en.wikipedia.org/wiki/Egeria_densa. That will grow in very basic lighting and is good for taking up nitrates.
The fertilizer stick will help your sword plant, but it will need light to photosynthesize & utilitize the ferts.
I saw "frill" identified on another thread - I believe that's egeria densa aka anacharis aka waterweed http://en.wikipedia.org/wiki/Egeria_densa. That will grow in very basic lighting and is good for taking up nitrates.