Yellow Spots and starting to curl

I've got a short rider plant about 4 weeks old. It had yellow spots on it's second set of leaves before but it seemed to go away, they are not coming back however and the leaves are starting to curl. It's in an aerogarden with a 1 gallon reservoir. I'm just changed the water Sunday and put in new RO water with 3mL of each Micro, Bloom, and Grow. pH is always between 5.5 and 6. Could it possibly just not be getting enough nutrients since I'm using such little amounts of nutes right now? If so, how much would be recommended for a gallon of water?
Also, the leaves feel very thin, not sure if that has anything to do with it or not.

to me it looks like a calcium magnesium def. cal-mag or cal-max should do the trick

Okay. But is it possible that they aren't getting enough from the nutrient solution. My ppm is 204 at the moment, and I'm pretty sure it can be raised to about 600 right? The Micro has 5% Ca and the Bloom with the Grow has 1.7% Mg combined.

i had the same issue yellow spotting tacoing leaves and crispy feel the calcium magnesium def helped my plants i add about 3-5 ml of cal mag per gallon every few waterings heres a good ppm chart

• PPM for Hanna Chart PPM
  
  
  Seedlings, Early Sprouts 100 to 250
  
  Early Vegging 300 to 400
  
  Full Vegetation 450 to 700
  
  Early Blooming 750 to 950
  
  Full Mature Blooms 1000 to 1600
  
  Note: EC Calculations are different, here's a conversion chart :
  heres a great chart that shows how different PPM can be from meter to meter... EC is the only real universal language...
  
  

  

  
  
  Remember to discount the ppm of your water.​
  
  
  
  

Okay. Thanks a lot. I'll have to order some calmag because I can't buy any around here. Hopefully upping the ppm will help for the time until then

any gardening store will have

Bang on! Cal-mag along with a higher PPM will come as the knight in shining armor for your young girls.