First time rdwc... need help pls

Hi this is my first time in a current system. Its a 32dbxl from underr current. Its a 8 lights ( 4 x 1000w DE cooled tube) and ( 4 x fluence spydrx led.)

Plants have 3 weeks veg whit uc nutrients. The clones were taken from a reveg plant.

I fucked up i think because i was reading schedule for coco and not rdwc. Big difference in ppm inwas giving 800 ppm.

When i illuminated i started messing whit barrels ppm and ph i even put too much ph down and went to 4.5 ph
For about a hour before i see it and drain half the system and put back the water to 6.2ph and 500ppm 0.8 ec.

I also fucked up whit water levels i let the water level at 2 inch over the net. It created a l saturation of the root crown.

Can someone help me whit some tips. My new growth start to be light in colour.

I have water from a pond that a pass in tall boy filters but it is not white white water...has a 70 ppm in it.

Need to know what im doing wrong. Water levels, ppm...

Water is at 68 degree
Room temp at 75 degree
Co2 at 650
Rh at 60-70

This is my firt thread. I grow soil for 10 years. And i now twisted to half in coco and half in rwc. And im having issues in both.

Nowhere have u mentioned any nutes u use and how much of each

Any enzymes cleaner

Not sure pond water is a good option,who knows what's living in it

Pond is my only option. I was planning on a ro or similar water treatment.

I use all line of current culture.
Uc roots, veg a veg b and some cal mag.
I mix everything to get a 0.7 ec

You drink pond water? Why is it the only option

Because it is a rural nursery used for agriculture activity only.