Hydroguard in flowering?

Im 5 weeks into flower and I think I have root rot. I will post pictures, but my reasoning for thinking so is I am showing deficiencies that shouldn't be there, and the affected plants are not drinking nearly as much water as my healthy ones. Is it too late to fix with botanicares Hydroguard? I don't care if I have to wait longer. I just don't want to take her out unless it's absolutely necessary. I have backed wayyyy up on the feeding because it appears to be burnt. But I do have healthy plants that I have been feeding the same thing. Another reason I'm thinking root rot.

I have had both, this time I fucked them totally up by mixing brands and fried them up...and to me those look like clear nutrient burns...the earlier you flush it out the better..I letted mine go for too long....anyway root rot leafs look different like folding together and drooping because no oxygen....inspect your roots if you can, smell them and see if they look rotten...anyway your plant looks more like it has nutrient lock down so read about nutrient burn flushing method with plenty of ph water for sometimes 3 days (depending on media and style), and eventually go back to first half and the full feeding after a slow build up...nutrient over feed will have that burned tips etc. symptoms as yours.. (and mine !)
In my case too much PK too early from wrong brand ....