I'm in very late flower with my AK48, and It's a 4 site DWC/Bubbleponic system. I'm using Fox Farm Big Bloom, Tiger Bloom, Cha Ching. Running RO.

I'm trying to get the buds to finish (Ripen), and I'm trying to get my PH from dropping below 5.5, but it keeps dropping below 5.2 even below 5.0

I've already flushed with Cearex and RO for 48 hours, got it back up 5.58/70 ppm, then re-nuted at half strength....but then it fell again!

What should I do to keep my PH in range, and allow my girls to finish? Here is what I have to work with..Maybe I can get some suggestions.

Nutrients/additives:
Fox Farm- Grow Big (Hydro), Tiger Bloom, Big Bloom, Open Sesame, Beastie Bloom, Cha Ching

Botanicare- Cal-Mag, Sweet Berry,

Ceanser/Preventative- H202 12%, Clearex, Hygrozyme

I also have GH Flora series, but I've been using FF throughout this grow.

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You ph the water before you add nutes?

Nutes are going to lower the ph so I would add them first and then adjust the ph

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http://www.rollitup.org/grow-journal...-my-first.html

No, I always add nutes then PH it....I mix it all in a 5 gallon bucket befor it goes in the res.

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I'm not sure if this a joke or if it's real? You are LATE in flower and you have this question? How late are you in flower?

You could try, I dunno, PH Up. And why are you adjusting the ph before adding nutes?

This is crazy talk for someone to get this far in DWC without understanding this.

I must be misunderstanding the question. I'm not trying to be an ass, I'm just SURE I've misunderstood something.

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"It picked up some dandy-lion pollen or something from your yard and popped out a bastard seed. " --Smokingrubber
Current Grow(s):DP White WidowFucking Incredible

I start with plain RO, add nutes, then adjust PH. I fill the res then 12 hours later it goes from 5.8 to 5.0. Then, I take a gallon of plain RO, PH it to about 7.5, ( take a gallon out of the res if needed ) add the 7.5 which brings me back up to around 5.5-5.6

I use PH up....it's just not staying.

I should be harvesting this week, most of the hairs are still white and haven't receded into the bud. I'm locked out.

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This isn't a good problem. Your ph is dropping drastically overnight? Late in flower? Have you been using h2o2 in your reservoir? The only time I had this happen to me was when there was a bacteria in the reservoir.

Not good. Hopefully you are really almost done.

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"It picked up some dandy-lion pollen or something from your yard and popped out a bastard seed. " --Smokingrubber
Current Grow(s):DP White WidowFucking Incredible

Yes thank you, I know it's not a good problem, I haven't come across many good problems in my life.

Yes I have H2o2 12%. There is not any slime in my res or on my roots. No light leaks in the res and a shit load of bubbles.

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Yeah, it's not mold or algea, it's bacteria. It's not going to present with slime or with anything at you can see. Sometimes a smell, but not always. The biggest indicator is going to be falling ph, especially drastically falling ph.

You gotta clean it all out, but this is one of many reasons I hate DWC. I say it's not a good problem only because I'm not sure what to do about it in DWC. I use Ebb & Flow and the remedies are fairly simple. I know it doesn't directly help you, but maybe you can think of something. I would flush the reservoir remove the pumps and lines, remove the plants from the tray (they are in pots, in rockwool, with hydroton (kind of like netpots) and run everything through with a solution of water/bleach probably in the neigborhood of 30:1 to clean it all out. Then rinse it clean very, very thoroughly, I would either replace the pumps or run them with the cleaning solution. Clean EVERYTHING I possibly can, obviously the plants in their pots with hydroton aside.

I'd put it all back together and refill the reservoir and a product with beneficial bacteria. Something like AN Tarantula to give the reservoir a chance to fight the bacteria that will still exist in the roots and in the pots theselves. Should go a long way to getting it under control.

Might help just to drain the reservoir completely and refill, but this time add the tarantula or something simliar.

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"It picked up some dandy-lion pollen or something from your yard and popped out a bastard seed. " --Smokingrubber
Current Grow(s):DP White WidowFucking Incredible

I have Aquashield, do you think may help?

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It has a very good chance of helping. I've never used that particular product, but I've read others that swore it helped with root rot. I know it's not the same, but it's a bunch of beneficial bacteria. It would certainly be worth a shot compared to nothing.

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"It picked up some dandy-lion pollen or something from your yard and popped out a bastard seed. " --Smokingrubber
Current Grow(s):DP White WidowFucking Incredible