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Your plants are perfectly healthy, but the way you grow in soil is looks more like a hydroponic way, I assume this is the reason why they are so small for 5 weeks. Ph must be in the range of 6.4-6.8, flushing soil is bad idea, as nutrient availability is very dependant on microbiological...

LED's mainly have the smallest wave length of 430nm, it's not classified as ultraviolet, ultraviolet starts at 400nm and below. 430 is still enough to produce trace amount of ozone which will only damage baby plants if you put it too close. UVB has wave length ranges from 315nm to 280nm, and...

Sorry mate didn't mean to interfere but I am just saying what I know about UV.

UVB is an ultra violet spectrum of light, it fuse oxygen in the air into ozone which known for it's disinfecting properties, but at the same time it reacts with all organic matter by burning it on the micro scale. If you are a professional grower and you know what you are doing UV light might be...

osculating totally fine mate, it's even better as it's create more air movement.

If you have fan constantly blowing directly on plants and an exhaust vent don't worry about bud rot.

As long as it is boost accelerator and not PK boost. I know it's designed to be sprayed but there is absolutely no need for that, flowers will get whatever they need from the soil as long as they are healthy. Foliar feed designed as a temporary way of feeding when there are a problems in the...

Hello mate, I have to agree with members, there is nothing wrong with the plants. They are looking healthy and happy for the first grow well done and your set up looks very well organized. I've noticed you have some water drops on the leaves, I assume you do some foliar feed on the flowers, I...

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You can try 1.5 but make sure not to go over 600 PPM, it's so easy to burn autos with nuts if you see something like this , you will have to flush. But just to make it clear, your plants are not expereincing deficiency, all this spots from pH problems. Phosphorus deficiency looks like this...

They look much better!! Now you know the best way for hydroponic grow how to check for toxicity or deficiency, TDS meter is a great tool.

perhaps run-off is darker because there is some dirt, you need to filter run-off with coffee filter to do a correct visual spectrophotometry but since you have a TDS meter don't worry about it.

wow unexpected reading, than you better increase your a+b to 1ml/l ) And keep on recording the readings mate

Personally I get my water straight from the tap, it comes out at about 13 degrees or so, than I mix all my nutrient and let it bubble for couple of hours, If you keep your water in the bottles for a long time, you can get some algae or other type of slime that is no good for plants. Especially...

You can keep it in your tent, just don't let any light to get in the water.

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When you give plain water pH must be 5.8 too, 6.5 too alkaline for coco, and phosphoric acid is perfectly fine to correct the pH. Now it's obvious that all this spots are coming from pH fluctuation. I am sure I did mention in one of my posts about always keeping pH at 5.8. You need to water 3...

Hello ozzy, the plant on the right is not looking well at all, but don't worry we will find a problem, but you will have to do some work. Make a full update when you comeback from work. I need next info. Some pictures from different angles. For Nutrient solution: pH, PPM(hope you followed my...

Ozzy I know from my experience autos don't like nutrients, also well known member in the post above mentioned it too. I also know that canna coco has perfect ratio of NPK thus if there was a deficiency it would be multiple and growth would be stunted. I can see a good progress and a healthy...

Hello ozzy, , I can see burned tips, it is a little nutrient burn, you need to reduce a+b back to 0.5ml/l for a week or so. Can you upload full size picture of both plants