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inside is a pH of 6-6.5

That pot holds its water for a very long time. I watered a week or so ago and the top of the mix is still wet.

I'm growing some bubblegum in peat moss, vermiculite and perlite under a 250W ceramic metal halide and I'm around 4-5 weeks into veg and the claw started about a week ago and I have no Idea why (my guess is over fert, but it's happening in new growth as well). I'm using Botanicare pure blend pro...

bought a meter, what do you guys think ofhttp://www.saltysupply.com/Dual-Inline-TDS-Meter-p/FX1358.htm?utm_source=GAN&utm_medium=affiliate&clickid=0004b501ee172cb40ae06a8910451418&utm_campaign=k211893It got solid reviews on the web, so hopefully it'll be accurate

so would you say like half strength?

It's a blackjack seed from nirvana

I don't have access to a ec or tds meter, but I see what you're saying

I've been trying out DWC, but I haven't been extremely successful with at and I am currently (trying to) diagnosing a plant problem, but would like a second Opinion. I am currently feeding 30mL botanicare progro and 20mL their micros, liquid karma in a 4 gal bucket using the ratios found on the...

I should put in plain water while the other water and hydroton buffers?

That explains it. I suspected that the hydroton was to blame, but I hadn't read anywhere that you had to soak it in pH corrected water. Any recommendations as to what I should do?

What do you think is happening that could cause A continuous pH drop from 5.7 to 7.5 in a matter of 6 hours

what medium are your plants in? I'm using Hydroton at the moment. This is my first hydro grow and my second overall, so i'm still trying to get used to the plants.

I'm doing DWC though

I see what you're saying, everyone always says mix at half strength. Side question; how often should I change the rez?

so I set the pH to around 6 a couple days in advance and mix in 5mL per gallon and slowly add more each day until I get to 20 mL per gallon. Thank you very much.

It's been long enough that it wouldn't be in shock anymore, and thanks masp I didn't know that i had to get it from 5 to 20 in a few weeks. But the problem of pH remains. How do I control it? with pH down?

I'm on my 1st dwc and my plant is starting to get yellow patches on it and I'm having trouble controlling the pH of the water in the rez. I use about 5mL botanicare pure blend pro grow per 16000 mL water and just moved my seedling from soil to DWC a few days ago. Any advice on controlling the...

thanks a lot! I was getting anxious.

So, its dropping to the low 50's high 40's night and low 60's during the day. The trichomes are somewhat cloudy and few amber. any suggestions? also what are the safe growing temperatures of marijuana (more specifically nirvana blackjack). I will post pictures tomorrow.

I have a plant outside, and the tips of leaves turned purple, but this was because it got too cold. I believe that if what you have isn't a purple strain then this is probably the case. Try not to let it turn purple.