Yellow leafs and brown dots (fotos)

[Tommy G]

UpDate!

Bought a GHE pH test kit in the local growshop today, measured my tap water and its pH level is between 8 and 8.5

They didn't have pH down powder, so I went to a petshop and bought a little bottle of a liquid substance that works to decrease the pH value of the aquarium water. I'm just a bit worried because it says: "Use only with ornamental fishes"... so it is not suitable to use with fishes that end up on our plates...

Do you think it is also suitable to adjust the pH of the water that I'm about use to water my plants?

My R. Indica seems to look a bit better, but it may be too early to take any conclusions...

Thanks..

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[MynameStitch]

No, take it back, most likely it had sodium in with it. You want the ones that says safe for plants on it. They do sell IT TO BE SAFE ON PLANTS.

I would try to stay with a liquid based pH down for now if you can, if not that's ok.
Liquid form works quicker, where with using powder you have to let it sit for a bit and shake well to ensure it mixes properly.


Have you watered your plants with the 8.5 pH and then tested the run off from it?

 

[Tommy G]

Hi man! Thanks for your reply.

In fact, I need to make another update.

I got rid of the pH down that I bought in the petshop and managed to get a good liquid pH down that they sell in many growshops, named Hy-Pro pH-, made in The Netherlands and the active ingredient is "nitric-acid" at 38%. Bought 0.5l for 7.5eur. It lowered the pH from 8.5 to something between 5.5 and 6.0, by using 1ml for each 5 liters of tap water.

Had a very busy night yesterday when I kind'a transplanted the affected plants to the same container again and, in the meanwhile, I managed to get rid of half of the bad (I suppose) soil that was helping the deficiency. I changed it with a much better soil. I don't know if it is only coincidence but one of them already seems greener today, 24h later.

Have you watered your plants with the 8.5 pH and then tested the run off from it?

1. My GHE (General Hydroponics Europe) pH test kit doesn't seem to be able to measure the run off. It works by adding 3 drops of the solution in a micro "bottle" half full with the liquid we want to test. Then we compare the colour of the mix with the colours of the table that came with the kit. So I guess it is only suitable to colourless liquids, which is not the case of most of the run offs we usually get. Correct me if you think I'm wrong.

2. Yes, I've watered just one of my plants with the 8.5 pH after attempting to lower the pH with the liquid for the fishes and a good dosage of BioHeaven (the one with the micronutrients). Fortunatelly I'm usually careful and did it only with one plant, the less "important" one since it is from seed (it may even be a male), is only 25 days old and not very big... a Ruderalis Indica from SensiSeeds.

From now on I will only water them with tap water with the pH adjusted. Maybe I'll adjust it "only" to pH 7 whenever I plan to water the plants with fertilizer because most fertilizers seem to be acid and to lower the pH value of the water we mix it with.

I'll keep you informed about the recovery and hope to show pictures of them when they get better, soon I hope...

Thanks agains mate

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[Tommy G]

UPDATE!

Seems to me that they are recovering well, they got the green back (it is still a bit light green, but will get darker soon) and they grew a lot this last week, I guess the deficiencies didn't affect the stretch.

As I promissed here are the fotos:

Before (15 days ago):


Now:


Before (15 days ago):


Now:


All the 4 recovered plants (the 5th was a male):


My flowering bath tube with the 400wHPS:


So, I got it solved by changing half of the soil for a better one, watering with tap water with the pH adjusted (instead of bottled water) and some micronutriens from BioHeaven as well as some macros from BioBloom and worm humus in the soil mix.

Thanks to all you guys that tried to help, specially to MynameStitch.

Good gardens

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[MynameStitch]

Great to hear they recovered dude, now you know what to use and what NOT to use

SPread the knowledge

Happy growing dude!

 

[ackuric]

Just curious Psychotropic, what soil did you transplant them into, as you stated you started using a better soil. J/w what mix you went with. You really brought them back to life, looking good.

 

[Tommy G]

Hi ackuric!

I used Composana Universal, which I think maybe you can only find it around here (Portugal and Spain) since I guess it is a Spanish product. Well, in other European countries maybe, but in the States I kinda doubt. I also mixed it with some worm humus (10%).

Anyway, I think the key was not he new soil, any decent soil would have helped to solve it, the key was the "poorly" fertilized soil I was using: Biobizz LightMix (which I will only use again with seedlings).

I'm sure that if I used Biobizz Allmix instead of Composana the results would have been the same.

Stay cool!

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[Tommy G]

Completely recored now and starting to flower:

 

[MynameStitch]

Awesome dude! If you have a pot a little bigger, I suggest repotting them so they can fill out, not a lot bigger, but just a little bit bigger,

 

[Tommy G]

Thanks!

Yes, I understand, this pots have capacity for only 7 litres and I should be using the 11 litres ones. But maybe I'm going to let them into this ones because I don't want to run the risk of stressing them again and I took half of the soil out and refilled it with some new soil a few weeks ago, so I guess their roots still have enough space to give me some buds as the plants I have in my thread "400wHPS in a bath-tub".

Thanks again for the suggestions. Keep up the good work helping others!

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[MynameStitch]

Trust me, you won't stress them if the roots are rooted most the rootball will slide right out without ripping roots and as long as you do it quickly without hurting them you won't stress it out.

Just remember if you keep them in those pots you will get a decrease in yield. There roots grow in the first 2 weeks of flowering the most and the rest of the time it's growing to help supply the buds and there root growth slows down by half.