can lack of Co2 cause plant yellowing?

[cheyennefb]

we just put plants in last night, they are nice and green in one tank, and then in the newer one they are starting to yellow. could this be a lack of Co2? Any recomendations? and could it be lighting as well?

 

[cheyennefb]

the plants that are yellowing are red wendtii and green wendtii, and a sword

 

[evercl92]

Yellowing I believe is potassium deficiency.

Posting specs of your tank would be helpful: lighting (type, wattage, duration of photoperiod), CO2 (sounds like you don't use it yet), fertilizers, substrate...

 

[mgamer20o0]

def not co2 its a fert you need.

 

[WyldFya]

CO2 will only accelerate a plants photosynthesis, but unless it's a plant that requires CO2, it will get enough to still survive without injection. I would look at either your potassium levels, or your iron levels.

 

[Acer]

Not sure with aquatic plants, but chlorotic (yellow) leaves generally mean an iron deficiency, especially if the veins are still somewhat green.

 

[Muske]

What Maple said..