Need Help. Nute burn from low ppm possible?

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i was doing some maintenance check up just now and noticed some slime on my reservoir, specially on the cables hanging in the water (from the O2grow plates) it smells like slime.
I've been using Hydroguard as per recommended dosage, the roots look fine though. Should I worry? Rez temps are low, around 19C.
 

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The hydroguard will protect your roots from anything nasty mate dont worry.
Slime will still appear in the rez if there are any light leaks even tiny ones also keeping your res temps cool will help combat this.
Next res change give everything a good clean. You monitoring res temps?
 
The hydroguard will protect your roots from anything nasty mate dont worry.
Slime will still appear in the rez if there are any light leaks even tiny ones also keeping your res temps cool will help combat this.
Next res change give everything a good clean. You monitoring res temps?

Thanks mate, good to know.

Temps are ok, around 19C with chiller.

I just grabbed a more precise EC and PH meters with uS/cm precision and ph down to .00

PH is 5.78 and EC 0.8
 
Man... I was reading up on the current culture website. My diy rdwc is a copycat of their undercurrent 4 bucket system.
Only difference is I use electrolysis instead of air stones now.

And they have a feeding chart for super Oxygenated systems like these that asks for a maximum of 350ppm on PEAK flowering !

I guess I was stunting the hell out of these plants that's why they never looked perfectly healthy.

What the hell.
Anyway, nothing to lose now, only learning and getting more experienced, so I will flush and refill with a weak 350 solution and let it sit for the rest of the remaining period.
 
Man... I was reading up on the current culture website. My diy rdwc is a copycat of their undercurrent 4 bucket system.
Only difference is I use electrolysis instead of air stones now.

And they have a feeding chart for super Oxygenated systems like these that asks for a maximum of 350ppm on PEAK flowering !

I guess I was stunting the hell out of these plants that's why they never looked perfectly healthy.

What the hell.
Anyway, nothing to lose now, only learning and getting more experienced, so I will flush and refill with a weak 350 solution and let it sit for the rest of the remaining period.
Did you ever figure out the issue? I'm having same issue low ppm burning plants I'm talking like 65ppm. I use RO water as well. I'm wondering if it's a bad nutrient batch or somrhing.. My ph is fine humidity and light is optimal. I can't figure it out. It's driving me nuts. I run drain to waste and water daily until 10%runoff. I've done runoff tests and I don't have any buildup. I run coco and perilite with Advanced Nutrients ph perfect grow and bloom with voodoo juice. Also I've checked my resiviors and they are cleaned regularly. Plants are short and droopy and are on edge of burn. I've tried letting them go longer before watering and no change. Right now I'm out of ideas. Also my temps 70-75 lights off and 75-80 lights on with RH always around 50-60. Great air movement and lights are not stressing plants. Anyone got any ideas?
 
Ok after alot of reading and research I have a theory. Maybe the plants aren't burning but actually have a deficiency that looks like early nutrient burn like phosphorus deficiency for example. I'm gonna up my ppm and nutrients gradually and see what happens. I'll try with one plant first to see what happens.
 
Glad to hear it’s not bugs lol. Good luck getting it straightened out.
Thank God it's not bugs dude. By far the worst thing to ever happen to me. Fucking aphids took me forever to get rid of em.
 
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