unspecified problem (?)

Hello again guys .. I am here to ask for your help cause my head is about to explode .As you will see at the photos the curly leaves seem like heat stress but this is impossible because my lights-on temperatures are 16-20 C and my night temperatures are 11 Celsius... i know i must fix it... in the other photo seems like nitrogen toxicity but this is impossible too because my EC is 1,4 I use GHE grow-micro-bloom in dosage lower of the bottle guide. the other problem is that some leaves turn right or left .. also the leaves are a bit crunchy.. i feed my plants with feeding tubes 8 times a day for 2-3 minutes each. my feeding solution is a bit coldy too... 10 C
Hydroponic system ,30 days old from seedlings, rockwool as substrate. 400 W hps ,PH 5.6 constantly and moisture 50-60%
White rhino from greenh.
My opinion is that: locked nutrients from low temps
what do you think about it?
Best regards

mag def? i'd wait for more ppl to respond tho since i grow in soil and have no idea just thought i'd chime in and try to help ^^

Thirty days and EC of 777? I would say nute burn. Take that down to 0.7. Could be cold nutes locking out. Not familiar w/ your nutes, but see if you need to supplement silica. That could help counter your rez temperature. I know that you're in hydro, but do your rockwool slabs have enough time to dry between feedings? Maybe take it down to four or five times a day. Are you running any beneficial bacteria? If not, how are you sterilizing? H202 or bleach? Are your roots looking well? Is there enough dissolved oxygen in your nutes? Is there algae or pythium in your roots?

sorry mann 1,4 EC really sorry.... 777 tds but my tap water is 560 tds without nuts

my roots looks really healthy.. the roots in rockwool can breath well so i dont give oxygen to my solution

1,4 EC is still pretty high for a thirty day plant. Is that from seed? You might want to try to filter your water it would knock it down to 0.4. That would be a better place to start. You could also buy RO water. That is what I use. I also use rain water and I get less than 25ppm from rain that comes off of my roof.

i follow greenhouse guide for EC... for my stage suggest 1.6 EC....

It looks like the start of nitrogen toxicity to me.

Hello again today new symptom appeared .. Plants look better to me ... I dropped the ec levels .. What do you think about this symptoms ?

georsour said:

sorry mann 1,4 EC really sorry.... 777 tds but my tap water is 560 tds without nuts

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You should start filtering your water in some way. RO is the expensive pain in the ass option, or you could try a $15 whole home filter + $8 (for 2) carbon/sediment filter + $10 hose adapters. You need to cut your 560 PPM to less than half that or you will have issues unless you order custom nutrients to match your water. If you go RO you will also need to get nutrients specifically for it otherwise you will end up needing supplementation as most expect some calcium/magnesium from your water supply.

As an added advantage, you can hook the whole home carbon filter it up to your hose for spot free car wash too.

Never before had same problem ..my water tds is too big because of salts... I bought nutrients for hard water to fix this problem... High ec because of salts doesnt kill plants it can reduce the grow but in very high concentration ec 2,5 + because of salts

Looks like boron deficiency.

My ph is stable 5,6 and boron defiences are more usual to filtred waters.. I dont know... Strange whats your opinion?

Salts can definitely be a problem, usually later in a grow though, I think it could be cal/mag deficiency? nomo could be right about the boron deficiency, but those are pretty rare I think.

Calcium, Magnesium, and Boron should be present in your especially hard water and in your nutrients. None of the three should be in short supply. I would expect lockout. You aren't mixing your nutrients before adding to water are you?

If you don't fix your water situation you will have many more issues than others. You need to be working with water under 250 PPM or you will have nutrient issues without nutrients custom made for your water. If you don't want to filter, send a water sample to JR Peters and have them make a custom nutrient mix for you.

^^^^ he is probably right ^^^^

I measured my tap water today and tds are in pretty high levels.. 700 .. What if i mix tap water with distilled ?

georsour said:

I measured my tap water today and tds are in pretty high levels.. 700 .. What if i mix tap water with distilled ?

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If your grow is small enough that that isn't a huge PITA. 2 gallons of distilled mixed with 1 gallon of tap would be fine for most nutes. Maybe with your hard water nutes you could do 1:1.