Yeah, i don't multifeed a few days ago. I went back to watering when the pots are light and the top of the coco change colour. I put a heated propagator tray under the plants which is helping them in the overwatered cycle. I don't have an analysis for my tap water, but i can see some details on the water supply webpage:
Free active chlorine: 0.15 mg/l
Chlorine: 27 mg/l
Iron: 27 microgram/l
Manganese: 5 microgram/l
Nitrate: 11 mg/l
Nitrite: <0,03 mg/l
Ammonium: <0,05 mg/l
Total hardness: 163 mg/l CaO
No data for the Magnesium.
But yesterday i ordered some calmag, it will arrive within 2 weeks, because i must to wait for something that i ordered too.
I have an oscillating fan, but it can't see in the picture. It is below the hood. It is an oscillating fan 20 cm in diameter and 20W. It is running when the lights on. I have an 280 m3/h extractor, which is running always and half speed.
The bottom of the hood is ~ 25-30 cm above the plants. So the bulb is ~ 35-40 cm. I will lowering it. In flowering i will use 400W HPS (Philips GreenPower).
In veg i always used this 250W CMH, although i am thinking one 400W MH would be better.
I will take fresh pictures of the plant, of the roots and the equipment i have when i arrive home. In 10 hours