Green Gelato RQS

I use secret jardin. And few others who are also on Growdiaries use them too. No complaints about this brand. Good luck with the search

I would really recommend paying attention to what the plants leaves are telling you rather than relying on the meters. If you mixed the nutrients according to the chart then I would not add any more nutrients unless the plants show a deficiency. Most nutrient charts are a little heavy to begin with so easy usually does it. It is always easy to add a little extra nutrients but impossible to repair burned leaves. I stopped using meters because I never found a reliable one. With that being said, your plants look amazing from what I can see with the grow lights on. Good luck finishing them up.