help, plants dying, need advice aswell

[loucas6290]

i was just wondering waht plants you guys would recommend for breeding harlequin rasboras. i have heard that they need broadleaved plants and what i have right now is a teng with 4 amazon swords 3 white sandrias and one crypt, but i have a problem, the three white sandrias are turning brown and falling apart, i am confused why they are it is like it is spreading all my plants are turning just a bit brown in spaced and my new red ludwiga is not adapting well, i got it on saturday and its lost a few leaves and some have brown spots, all the plats weem to have brown spots on them like brown algae, ut i dont know what that is, its also on my substrate, anyone help me

BTW i am injectings CO2 i am not sure if i am doing this correctly, could that wreck my plants?

o yes iam going to pick up lighting tommorow, what watt flourescent bulb should i get, i am upgrading to 20G high during this week.

[Karnaaj]

What is a teng? And Sandriana's are a terrestrial plant not suited for long term use fully submerged.

[loucas6290]

i meant 10g and well then, i was misled by my LPS, is their deterioration and the slight deterioration of other plants interlocked?

[Karnaaj]

If they have reached the point of decay then yes, they can play havoc with youir water chemistry. I would remove them if you haven't done so already, then do a 50% water change.