Mega Noob, who knows whats causeing it

Basically i woke up this morning to find what i believe to be root rot, My ph these last 3 days keeps rising! like a whole 1.0 up over night, major pain, i put h202 in there with a 3% that has no stabalizer, add about 125ml a day to 5-6 gallons cause i read it degrades after about 3 days, my ph is always going up,
my ppm also rises about 5 ppm a day, at 80 ppm now ( they have had one feeding of a gallon at 100 ppms. ) basically wtf do i do now haha









so ya basically the first root/plant picture is the main plant in question

help kiss-ass

Looks like severe nutrient burn tbh...you sure your PPM isnt off?

im pretty sure the ppm meter is right, cause the water i buy says the ppm and it matches exactly on the meter

what kind of what are you using

brown slime algae....... an extremely aggressive algae.
very hard to kill. you need some food-grade hydrogen peroxide(30% or higher) to add to the rez...
however i would advise just letting the plants die, then taking alot of time to sterilize your entire op, inside, and out, with a very strong bleachwater solution.

next time put a few drops of peroxide in the water to prevent that