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Do you have decent airflow in there? What type of light and how far from the light are the tops of the plants? It's not nitrogen or magnesium deficiency. Possibly manganese but my first suspicion would be heat/airflow problem.

What was your temperature/airflow like in there? Alot of new growth yellowing is caused by high temps and/or bad airflow.

It always cracks me up when someone has a clear problem with their plant, and people say its just normal. Looks like your plant is showing the early stages of a problem, which i would suspect is due to your temps/airflow. Look at that meter it says 83 with a peak of 92. That is bad for your...

To my knowledge there is no such thing as a ppm meter which tells you the ppm of each element which comprises the overall ppm. Imagine how handy that would be. It pretty much answers my question though... i guess it was pretty obvious. The answer is yes, provided that the ratios of elements...

This makes sense to me and is what i have been doing aswell. Part of the reason is also because i have large pots and they only need watering every 4 - 7 days or so - i dont want to let them go up to 2 weeks on one feed. This is especially advisable in my opinion if you are in the situation...

Anyone have any answer to this question? Its kinda hard to search for this question on a search engine.

Is ppm reliable, as in, does it reliably tell u the strength of nutrients or can some nutes have a lower ppm and be as strong as another type of fert at a higher ppm? What i mean is, if 600 ppm of brand A nute is a good number for a plant, is it possible that nute brand B at the same ppm will...

Yeah i just got one too, and was surprised to see that the regular rate reccomendation was 5ml per 2 liters... This results in a ppm of 400 which may explain why my plants seem to be looking a bit off. Does anyone know why people say you dont need one? It seems to be of use.

Pretty keen on an answer to this too. I always wondered what makes soil so different...

Yeah its not N alright. Youd see it in the older leaves first, and it would be even across the leaf

I hear plenty of people saying you need it, but am yet to discover an explanation.

What i dont understand is why you need a higher pH when growing in soil? We're talking about water-solubility here, so what's different about water surrounded by soil, and water in a bucket? It makes no sense to me and you always hear people saying it but nobody explaining why it is that way...

I don't factor how old a plant is before i take cuttings. If it has enough growth tips, then you can safely sacrifice a couple. I often take a couple of clones when the plant is only 2 weeks old and it doesn't slow anything down.

Anyone? Do i need an ec/ppm meter to mix these nutes without risk? If so, what do i need to know? Remember - soil not hydro.

I got this great new little device similar to the one here (just a different brand) http://michaelbluejay.com/electricity/measure.html According to this device, my 600 watt hps light actually sucks around 700 watts from the wall socket. Is this normal? This thing is great. I can calculate...

I have switched to the 12/12 cycle today. I am going to be using this (NPK 6.2 - 3 - 10); http://www.yates.com.au/products/fertilising/water-soluble/thrive-concentrate-flower-and-fruit-plant-food/ I use their vege mix and it works great, so ill stick with the brand. I also have a bottle of...

We rigged it up so its flowing out the duct i was talking about so its blowing straight outside now... Much to my surprise, the noise is still there (albeit slightly quieter) so now i am not sure whether the noise of the air flowing out of the duct was even the problem. I made the noise even...

Perhaps i should explain my situation a bit better. I am in a room directly next to the lounge. Above my room is an attic, and i have the air pumping out from the attic (where the plants are) back into the house next to the stairway going up. What really sucks is that i already have a vent in...

Well the pantyhose didnt do much. Extending the duct a few meters worked ok but still too loud. Might have to try a silencer... Anything i stuff into the ducting just makes the noise worse.

I'm a bit unsure about that, because i've heard that some fans don't take well to having their speed reduced. I've got the prima klima 2 speed fan, and its already on the low setting. So you place this rolled carpet INSIDE the vent? So would it just hang out, and then act as an extension to...