Plant ID and choice help wanted

[hypnogogia]

Hi, I have some cryptocorynes in my tank, but am not sure which variety. Can someone help?
Picture below. I’m asking as I want to get some greener ones (these are quite dark) so as to avoid buying the same ones again.

Also, I’m after an echinodorus. I’m looking for a bright green and no higher than 45 cm when fully grown. Any suggestions?
Thanks

 

[Witcher]

I think it's cryptocoryne wendtii with Mg deficiency. BTW usually the stronger the light, the brighter green plants are as they need less chlorophyll to produce energy from the light. That's why plants like bolbitis, microsorums, moss, certain crypts etc are usually much darker (assuming they live in low light conditions) than for example tonina species.

 

[hypnogogia]

@Witcher thank you. I’m surprised about the Mg deficiency, as I use TNC complete to fertilise to a slightly lean EI.

 

[Witcher]

Hey @hypnogogia that's because crypts are root feeders, they need rich substrate to grow to their full potential.

 

[hypnogogia]

Ah, Ok. I put root tabs in, but only about 3 weeks ago. Guess they will take longer to work. So you think they will lighten up?

 

[Witcher]

I think they will if you keep them under strong light in open space. My crypts have green hue nearly identical with surrounding plants (under approx 1W/litre T5).