RQS - NL/250-400W CMH/Wilma/Clay Pebbles

Hy folks,

I started a new indoor hydro round.
Setup:
- 100x100x180 (in centimeters, ~3.5x3.5x5 in foots) Mars Hydro tent
- 75x75 (in centimeters, ~2.5x2.5 in foots) 50 liters (~13 gallons) Wilma System with 4 3 gallons (11.3 liters) smart pot filled with Hydroton
- I will cool the res with a Haliea HC-100A chiller. I will set the chiller at 19 Celsius degree (~66 in Fahrenheit) so the temperature will be in the 19-20 Celsius degree range always.
- I have a humidifier and a dehumidifier also. I will take care of the correct VPD.
- For veg i have a 250W 4200K CMH bulb, for flowering a 400W 3000K CMH bulb.
- I have a Hydrofarm Radiant air cooled reflector and an oscillating fan under this. And of course an exhaust fan currently without an actice carbon filter. I have 2 passive intake. hole.
- For the chiller i have a Maxijet 1000 pump.
- I have a home made drip ring. It has 2 rings with 8 T's.
- I have a Hailea 2500 liter/hour (~661 gallons/hour) pump for the drip rings. Each ring give 12 liter/15 minutes (~3.2 gallons/15 minutes)

- I will be using RO water, because my tap water is not good (i have analysis what i can post if you want).
- I have dry hydro nutes (called Ferticare IV -> 6-14-30 NPK) which i will supplement with Calcium nitrate and Magnesium sulphate. This fertilizer is very same as the JR Peters Jacks Hydro in the USA. I made stock solution from them. 1 ml contains 0.1 gram dry salt.
Strains:
4 feminized Royal Queen Seeds - Northern Light
I germinated them in rapid rooters and now they are 4 days old.

Later i will post pictures.

I'll tag along.

Along for the ride. Thanks for the invite

Day 6

Here we are now. I sprayed the rapid rooters just RO water in the beginning once per day, now two times per day.

I want to do this round perfect so i have some questions:
- Can I move soon the girls into the Wilma System?
- What is the ideal nute strength for them? Maybe 200-250 ppm (on a 500 scale so 0.4-0.5 EC)? Or the first time it is strong?

1. Relax on doing things perfect. Focus on learning how the plant responds to what you're doing.

2. Put them in the Wilma with the 400w light about 2' away. Lower it to about 14" over the next day or two.

3. I use around around 550ppm for 400w systems, depending on how much nutes the plant wants. Some want more, some less.

Looking good.

Now they are not looking good, same as the last round
400W MH, 550 ppm.
When the leaves become bigger the colour will be pale than browning at the tips and then at the edges This leaves stem is purple.

PH is 5.7-6.2.
I don't figure out it is a nute problem because i mix 3 part dry fertilizers or an overwatering problem. I googled the pictures of deficiencys but it is similar to the overwatered plant except the wilting leaves.
I tried watering:
- continuously when the light is on
- every 2 hours
- every 3 hours

What do you think?