Does this look like calcium/magnesium deficiency?

[Cactus92]

Nutrient rich soil grow in a very small pot
RO mixed with tap water 80/20 when top is dry.
Signs of deficiency started 1 week ago. What could this be? I'm suspecting it being lack of cal/mag- should i even bother trying to fix it, when it's so late in flower?

 

[JoeBlow5823]

Nutrient rich soil grow in a very small pot
RO mixed with tap water 80/20 when top is dry.
Signs of deficiency started 1 week ago. What could this be? I'm suspecting it being lack of cal/mag- should i even bother trying to fix it, when it's so late in flower?

Thats a cute little girl. No idea whats going on with it but entertaining...

 

[Cactus92]

Yes it's really cool - the bud does thickening everyday, suprised me too

 

[JoeBlow5823]

Yes it's really cool - the bud does thickening everyday, suprised me too

I know there are a couple people that have done solocup grows maybe search the forums and see what they did.

 

[Cactus92]

I will have a look. Thank's for the advice!