Yellowing

I have a nutrient spreadsheet linked in my profile's comment section. Type stuff in and your ppms will help deduce the problem. Consider recent behaviour, but looks a bit like a S deficiency.. Other things can cause this type of symtpom even when there is an abundance of S present. So, ensure pH is good. Based on solubility graphs, you could raise your pH up a bit and that'd help with S too. If you provide plenty of S, this is an excellent option to look into... if you see ppms are high in competing elements, you may need to take a different approach. concentrations ratios pH All equally important. All can cause false symptoms that lead you down the wrong path.