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Your ph is off, and it is probably from you trying to mess with it, unless it is some messed up soil to begin with. I would consider re-potting into 'known' soil or a promix soil-less type medium. If you have to start fucking with the ph in a soil type medium you are fucked right from the...

https://www.rollitup.org/hydroponics-aeroponics/195439-h202-bacteria-enzymes-everything-you.html

The h2o2 will wipe out the beneficials, so be prepared to use h2o2 for the remainder of the grow (every 2-3 days). Look up albfucts threads, he goes into dosing.

Guys, if the h202 is 'saving' your plants then you have environmental problems, i.e. your nute temps or watering intervals or water quality is off. There is nothing wrong with h202, just keep in mind it wipes out all the beneficials as well and you will have to do it ever 2-3 days. And it is...

It just means that RE works and you did not up-pot in time ;)

I run a sealed room as well, but opt to vent every 3 hours for about 3 min. My room is about 10x8x6 and a tank of co2 (25lb) lasts about 5 weeks in flower at 1400ppm. I use a cap controller, which sucks but works fine as long as you throw it on a cheap timer that resets the cap ppm3 every so...

Under 70, if your res is in the same room as your plants you will need a chiller. Your res will have ambient temperature unless you manually cool it down with ice packs (I would only do that in an emergency) or add a chiller. I think that you can add some hydrogen peroxide (check about dosing...

Sorry, I must have missed these pics :( That water temp is not acceptable, you will need a chiller, or have to grow in soil.

Cheers :) Well, I'm not so sure if it is a nice write up, judging by the response lol. Either it looks too complicated or people do not understand the potential this type of controller has in a grow room :) Especially since we are using mechanical relays instead of solid state. I'll take some...

You can find the instruction on their nutrient calculator print out ;)

Thanks guys, but I'm sure that all my perimeters are spot on. I run a sealed room, chiller, dehumid, ac, etc. My res temps stay between 66-69f. And yes, I do wait the 15 min. I've been running HG base nutes for a long time (4years), I remember days when HG instructed not to use air stones...

So, since it's slow in here I'll post more pics of my current grow. I'm using strictly hg nutes and have just started Budxl about 3 days ago. One of the plants is a little deficient ca, but it has been addressed best i can without jeopardizing the other plants. The plants are currently 27 days...

Ha, I hear you :) It's all good, just trying to think ahead a bit here. Consider that you want your only child to carry a lot of fruit one day and in order to do that she will need to be able to support them. If the inter nodes are spaced that far apart you will have a hard time to get all of...

No worries ganja brother, and yes you can use distilled, it's just so darn expensive. Be aware that distilled water is completely empty just like ro, and you will have to supplement with cal-mag. Use 5ml/g in the beginning, but only with good quality base nutes. The foam has got to go!!! How...

Ha, I guess we need to know the definition of the words 'looks ok to me' I'm just messing around, but honestly, in my book 'looks ok to me' is reserved for plants that do not show clear signs of root issues.

florist foam, you must be kidding me bro! That shit is closed cell and roots can not get established in that. :( Start over, read tutorials first!!!!!!! As of now, you have become quite proficient in killing ganja plants, and that is not easy! (no epsom, no distilled use ro, boiling water is...

I agree, that brown spot on the new growth is not a good sign!

This is not looking good bro, I would give them a complete flush (ph'd water) and do not water them again until the pot is almost dry. Do not use any nutes for now, she will be fine without the nutes. Kind

They were either scorched when the affected leafs were the top leafs or suffered nutrient burn at that growth phase. Don't matter anymore though, since the new growth looks good to me from the pics. Kind

The plant is finishing up, it is done brother! Herm or no herm, you need to get the environment fixed (tons of tutorials out there) and start over, ideally with some light this time ;) Sorry for the loss! Kind