Plants droppy hydroponics

[Grow8369]

Hi there people . Have 2 hydroponic 60 litre buckets with 2 plants in each

Spider farmer sf4000 as light . 24 inch from canopy

Using ghe flora nutrients

Ppm 550

Ph 5.9

These are big bud auto flowers on and 18/6 cycle

Got amazing airflow and extraction with carbon filter

Water temperature is 20 degrees Celsius

They where fine few days ago and after I changed the water they began to look very droppy

Any help would be much appreciated . Thanks people ??

[Grow8369]

Forgot to mention there 4 weeks and 4 days from seed

[Jingo]

Does your setup allow you to lift your plants up and get a picture of the roots? They should be bright white with no smell and no slippery feel.

[Grow8369]

Yeah the roots are ok and no smell

[Jingo]

What size is your air pump?

[Grow8369]

2 stones in each . Pump is 30l a minute so 7.5l a minute each stone . So 1 bucket has 15l per minute

[Jingo]

2 stones in each . Pump is 30l a minute so 7.5l a minute each stone . So 1 bucket has 15l per minute

I would be looking for a minimum of 20 liters per minute per bucket, I used to run 40 to 60 l per minute although you need a manifold to adjust for each bucket when you do that.

[Grow8369]

You think that is the issue ? They were thriving last week

[Jingo]

You think that is the issue ? They were thriving last week

Yeah they get to a certain size and they just don't have enough air to keep going, unless you do have some root rot or something going on.

[Jingo]

If you want to test my theory without spending any money put all the air stones in one bucket for a few hours and see how that plant looks.