Iron deficiency...?

Hiya
Well its 3 weeks which is when problems always seem to arise and sure enough...
My Raspberry Cough isnt looking great. The first week she had nothing but ph'd tap water, 2nd week Canna Start and Rhizo (started at 50% and moved up to 100%) and yesterday filled my DWC rez with Canna Hydro Vega A/B (both 1.5ml/L, recommended 2.5 - 3.5) Cannazym and Rhizo 100%. Ph 6, ppm 450 (tapwater is 120) so 230.
Clear yellowing of leaf and brown patches on new growth. Im only a rookie but i reckon she looks hungry and i outta up the nutes nearer to Cannas own recommendation.
Id be really grateful if any one could help me out here.
Cheers!

Feed Them! What lighting type are they under?

Cheers, a diy 4 x cree cxa2530 light I built...

I know people rave over canna products, but if a fert isn't working for you and you don't know why, it might be best to try a different one. I'd suggest Dynagro 7-9-5. One teaspoon per gallon and see how that works for you. It's a well-rounded fert. You'd dump all the canna water and replace it with Dynagro. The amount of this fert used is much less in soil, 1/4 to 1/2 tsp per gallon when you water the soil. Read instructions on the back.

shiva71 said:

Cheers, a diy 4 x cree cxa2530 light I built...

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Just from my limited LED experience I'm noticing an increased demand for at least mag if not both cal and mag and a little higher overall nutrient ratio.
Feed that girl.

If anything the nutrient missing is Sulphur.

Thanks guys. Added an extra 1ml/litre which takes me to Cannas lower end rec'd use and this is how she looks 24 hours later - noticeably more colour in her cheeks.
I reckon i'll try another 1ml/litre and some cal-mag and see how she handles it. Being in dwc i guess one advantage is that if you over feed then its fairly easy to empty the res and fill up again at lower strength.
What do you reckon?
Cheers!

Not iron, iron causes light coloured veins.

Cheers ANC, but would you agree she looks better for having had an extra ml of nutes?

polishpollack said:

If anything the nutrient missing is Sulphur.

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I agree with this

shiva71 said:

Thanks guys. Added an extra 1ml/litre which takes me to Cannas lower end rec'd use and this is how she looks 24 hours later - noticeably more colour in her cheeks.
I reckon i'll try another 1ml/litre and some cal-mag and see how she handles it. Being in dwc i guess one advantage is that if you over feed then its fairly easy to empty the res and fill up again at lower strength.
What do you reckon?
Cheers!

View attachment 4126178

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Just don't over do it ! Under feeding causes deficiencies that are simple to fix, deficiencies caused by overfeeding causing lock-out, not so easy.

Epsom salt is your friend

yes, it was definitely limited by something. Colour is too light.

Got some epsom salts, looked into how much to use and added a heaped tablespoon to my 6L res...really hope it works!
Thanks for all the help!

How close is your light?

About 6 inches.

shiva71 said:

Got some epsom salts, looked into how much to use and added a heaped tablespoon to my 6L res...really hope it works!
Thanks for all the help!

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Let us know how she goes! The awesome thing about Epsom salts is it covers two things that marijuana loves, sulfur and magnesium. It's great for both soil and soilless growing as it is highly water soluble. Just keep in mind that since you are doing hydroponics you want your pH to be between 6.0-6.5. The best sweet spot is 6.2 or 6.3 for all stages of growth as there is no element that absorbs less or more than the other. But being nutrient specific could be beneficial. 6.5 is better for flowering as it hits the sweet spot for Phosphorus, Calcium, Magnesium, Manganese, and Molybdenum. While 6.0 would be best for vegging since it hits the sweet spot for Nitrogen, Iron, Zinc, and Copper.

Don't be afraid to ask questions. People like to say "you should Google before you come here" but Google can only go so far. Google can't help you by deciphering pictures, environments, mediums, strains, etc. I gotta feeling you'll growsome good shit! Looks like an indica dominant lady too, my favorite

Thanks for the encouragement SS. Discovered to my horror today my ph was 4.2!! Hopefully fixing that plus the salts to address whatever deficiency it was will get my girl back on track.
If anyone is interested, keep an eye out in the journal section, i might start a diary if and when she takes off. Its quite a funky grow in 1ft x 1ft cab i made myself, im just curious to see how much i can harvest from such a small space...

very small space.

Yep. Having discovered my ph was 4.2, checked ppm and was alarmed to see it at 1700. Im screwing up so badly its a miracle she is still alive. She's been topped, new growth looks burned but lower side branches dont look too bad.
Would the epsom salts have sent the ppm skyrocketing?
She's got just ph'd water at the mo to hopefully flush out the nute OD, i'll start back on very light nutes and salts tomorrow.
Any advice welcome!