Soilless drying fast?

Hey everyone I am currently using Promix Soilless and I have recently got nute burns, they were flushed last week with tap water.

2 days later they were fed with 1/4 lucas formula GH
2 days after they were dry again so I fed PH water with CALMAG

It's been two days since I last fed water and the soilless is now dry again... is this normal?

I also think there's something slightly wrong, the light green leaves to fading slowly to deep yellow color....any ideas?

Temp: 78-83 F
Humidity: 45%
Ph: 6.2
600w HPS about 1.5ft away
120w LED about 6 inches away

How far along are you?

blimey said:

How far along are you?

Click to expand...

I am about 50 days from germination. I haven't even fed full strength yet!

Flowering or veg? How often are you giving it nutes?

Well the soiless is designed to have really good drainage and air flow. This lets the medium dry up quicker. It's similar to hydroponics in this fashion of growing. Soiless essentially IS hydro the way you are feeding. I am having a similar situation with the yellowing leaves ATM so I'm a little disappointed. Need more dolomite lime...

Did you get that mix wet to begin with? Yeah, soiless, good drainage, air flow, yada, yada. That's just drying out too fast. Dry peat will actually repel water and that's what it sounds like.

Wet