your lucky thats the lowest ppm num i have ever seen. based on your plants age,use the scale of ppm numbers i posted for you.auctually copy and paste that to your computer it will save u tons of trouble in the future i promise.with your system full of water and calmag only,start adding small amounts of nutes.test your water.then in 2 hours go back and check again.because u are doing a recir system u need 2 give it time to even out.after 2 hours check again if your numbers are low add a little more nutrients.basically it just takes time even your system out and mix every thing up..for the next 24 hours go in and randomly test your water through out your day/night.numbers change and especially right now u need to be on top of it. i would try and stick to the lighter side of nutrients for the first little bit.all of the plants have stress from transoprt and setting up a new home"it happends to every one" and then start upping your solution.as a personal note i do need to say that bubba is a light feeder during veg.so keep it simple and try and find a good number that both strains like.