since I use synthetics in my DWC now, I use Dutch Master Zone. It does the trick, one of my Cotton Candy Kush started showing a little root/rot bc the rez temps are mid-upper 70s and I added DM Zone at recommended strength for problems and it cleared up within 2 days. I now use DM Zone for every rez change. No problems since.

I really like DM b/c their products are reasonably priced (half of AN) and they tell you NOT to use additives with their products. I like not having to buy 20+ additives to have the 'perfect' harvest. My next nute purchase will be the DM Gold line when my Sensi Grow + Bloom runout. The DM nutes are literally HALF the price of Advanced Nutrients. And the gold line specifically states not to use bloom boosters bc their product is so strong. We will see, hopefully I'll save some money.