Help please

Dunno what this is guys is it a fungus or mega bad nute burn ? Thought it might be hot soil but yeah just want to get some advice.

The ph of water is 6.7, the ph of soil is 6.5

The plant is 4 weeks old from germ, I use rain water in a reservoir hooked up to blumat watering system, the medium is organic peat/super soil with perlite aeration.

It looks the same problem in this thread https://www.rollitup.org/t/unsure-what-to-do-with-this-symptom.978342/

Are you adding cal mag to your rainwater? Appears calcium deficiency.

hotrodharley said:

Are you adding cal mag to your rainwater? Appears calcium deficiency.

Click to expand...

Haven’t been adding anything in the rain water, thought the soil would have enough cal in it. Should I add gypsum to amend calcium and Sulfur ? The soil is already 6.5 on the higher side don’t want to raise ph too much

Slime92 said:

Haven’t been adding anything in the rain water, thought the soil would have enough cal in it. Should I add gypsum to amend calcium and Sulfur ? The soil is already 6.5 on the higher side don’t want to raise ph too much

Click to expand...

Whatever you can get. Tap water often has adequate amounts of both.

Yeah, your pot plants seemed dehydrated. You need to feed them and spray the leaves, too.

Herb & Suds said:

It looks the same problem in this thread https://www.rollitup.org/t/unsure-what-to-do-with-this-symptom.978342/

Click to expand...

Problem wasn’t resolved and since gotten worse

hotrodharley said:

Whatever you can get. Tap water often has adequate amounts of both.

Click to expand...

We are on tank water unfortunately, just worried about over correcting it with gypsum, maybe half a recommended dose ?