TGA super soil need advice please!

So i got a bunch of TGA super soil (pre bagged) and so far im loving it. But they do have a bit of light lime green fade and some purple on the stems so i know they arnt 100% healthy. Im wondering what should i feed it to help them out? Im just feeding them nutral water with 0-10 PPM so they are on a straight RO water regiment. Any advice? I was thinking maybe a little CalMag but wanted to check with experianced super soil growers.

Thanks guys have a dank day!

well supposedly subcools super soil isnt supposed to need any feedings from start to finish so seems you been jipped m8..

get a 2 part nute regiment like fox farm trio and start giving 1/4 strength feedings. thats my advice with no pics so goood chance im wrong..