floating plants hinder light diffusion?
 

Yes, that's why I don't use them.



Crypts grow bigger in such tanks as they reach up for the light. That's
why I use them.



These posts bring to mind an old Rocky movie where the boxer (who has
money now) is asked whether he's interested in condominiums. Rocky's
reply "I never use them" :) . Likely result: many little Rockies ...

Steve