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Old 06-22-2018, 03:12 AM #1
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Diary of a hot White Rhino. 250w CFL DWC

TROLLS BE GONE!!!

Here's in Texas it's already 100 degrees almost every day. If not 105 in between. Got a late start outdoors so I decided to pop two white rhinos into a DWC 7 gallon tote with a 250 watt cfl under a hood... It's not in an air conditioned room nor is that an option at the moment..

BEFORE WE BEGIN....

I KNOW that the ambient air temps are gonna be WAAAY above optimal and this will slow plant growth etc. Res temps will be higher than normal as well... more smaller cfls will generate less heat/be more efficient. The list goes on and on about how this isn't perfect.

BUT... It's what I got so it's what I'll use.

We're gonna treat this as a "How to hydroponics in high temperatures" kind of thing. And see what happens. Sort of an experiment but.... I digress. Any of your experience and help is appreciated!

On to the show!

Equipment:

Vivosun 2'×3' tent
Vivosun 950 gph air pump
4" inline fan and duct
Oscillating fan
250watt Gotham hydro cfl and hood

General Hydro 3 part nutes
Hydroguard
Pancellant ph and ec pen meters.

And of course... good old frozen water bottles for the redneck reservoir chiller.

All to grow 2 White Rhino feminized seeds from Nirvana..

Seeds popped Tuesday so I put em in some horticulture Styrofoam and into the lid. One has sprouted and has its first baby set of serrated leaves and the other just sprouted and shed it's seed.

Stick around!







Sorry for the sideways pics, even when I edited them it wouldn't load straight. Will have to start taking them sideways to begin with!
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Old 06-22-2018, 04:22 PM #2
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LET'S POLLUTE THIS THREAD

Lets throw some pics or info of cfl/hot weather grows anyone has done in the past in here! Would love to see some past attempts....

If there are any
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Old 06-22-2018, 05:03 PM #3
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i had no problem keeping plants up to 5cm from 250cfl //horizontally or vertically // in up to 40Celsius outdoor heat.

I had only one fan for oscilating the cfl and 1M2 and 1,8meter high growbox. //passive intake of fresh air-only slightly open growbox//
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Old 06-22-2018, 05:08 PM #4
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Good to know! I put a larger fan in there last night. High humidity and high temps are a recipe for mold from what I understand. Never ran into it yet! But I hear air flow is critical to prevent it... I ran into root rot last grow. Found this hydroguard stuff that is supposed to do wonders.

The bottle of hydroguard was hot from sitting in the mailbox all day in 100° weather. HOPEFULLY it didn't kill off the bacteria in it...

Anyone ever had a problem with algae USING hydroguard??
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Old 06-22-2018, 05:09 PM #5
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Quote:
Originally Posted by burmese View Post
i had no problem keeping plants up to 5cm from 250cfl //horizontally or vertically // in up to 40Celsius outdoor heat.

I had only one fan for oscilating the cfl and 1M2 and 1,8meter high growbox. //passive intake of fresh air-only slightly open growbox//
What strains did you run?
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Old 06-23-2018, 06:12 PM #6
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Yeah.. I'm guessing Burmese was running soil. I've seen people boasting about running their water temps as high as 80-82, but never 100.

You'd have some invest a fair bit of money into discretely cooling your shed for a hydro operation. If you can't run an ac discretely, im sure it'll look even goofier running around with bags of ice or what have you. Soil generally produces a better product anyways. Nbd.

I would grab a bag of sunshine#4 for the shed project and throw the dwc into a cool basement. I would probably also just.. not grow during the summers. I drove 3k miles a week through Texas for a few years working for Marlboro and.. yeah, no..

TBH, If I were you, I would fill up my gas tank, pick a direction, and just keep f'n driving
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Old 06-23-2018, 06:38 PM #7
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Thanks for the advice!



The summers do definitely suck here. Like I said, if it doesn't work out then we will end up with the same amount of bud as if I didn't grow at all. It's always been something I enjoyed. Going to order a copper wort coil and see about making a homeade res chiller!
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Old 06-23-2018, 06:42 PM #8
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Quote:
Originally Posted by Bobby Boucher View Post
Yeah.. I'm guessing Burmese was running soil. I've seen people boasting about running their water temps as high as 80-82, but never 100.

You'd have some invest a fair bit of money into discretely cooling your shed for a hydro operation. If you can't run an ac discretely, im sure it'll look even goofier running around with bags of ice or what have you. Soil generally produces a better product anyways. Nbd.

I would grab a bag of sunshine#4 for the shed project and throw the dwc into a cool basement. I would probably also just.. not grow during the summers. I drove 3k miles a week through Texas for a few years working for Marlboro and.. yeah, no..

TBH, If I were you, I would fill up my gas tank, pick a direction, and just keep f'n driving
And you are absolutely right, if it becomes unworkable and I can't get res temps down with either a diy chiller or anything else for that matter, I'll grab a bag of good soil and maybe some michorrizae to get the roots to take hold and go from there. In all honesty that is PROBABLY what should have been done. So we will see
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Old 06-23-2018, 07:07 PM #9
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If you are going to run it regardless, I would do so with a dead res, at least all the way through veg, and save all the living stuff til the last few weeks of flower, once some sort of harvest has already been secured.. Undeveloped root systems will crumble under pressure. A bigger, more developed plant might just take the beating you are trying to throw at it.

I would at least have a small cab inside where I could veg them out into plants capable of fighting the heat battle in the shed. Younger plants, in the summer months, under the Texas sun, in a shed without ac..

Somebody que in Sarah McLachlan..
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Old 07-25-2018, 06:16 AM #10
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Long time no post...

Been awhile but we've made some changes.

Temps were hitting 105-110 here daily. There was just no way to keep the setup where I had it. So I moved everything underground where the basement temps sit at 77°
most of the time. Didn't mean to go so long without posting, but we're still going.


Had an issue with dead edges/yellowing. Looked like nute burn except in the middle of the leaves as well. Thought it was cal/mag deficiency. Did a bunch of reading and came to the conclusion it was lockout from a combination of my tap water and a couple days of 7 pH. (I was constantly having to chase ph down) ditched my 250ppm tap water for some RO water. Much less pH down and more room for available nutrients. Yellowing stopped and pH is much more stable. So far problem solved. Will post more pics of the deficiency and the current setup tomorrow. Slow Internet won't let me upload the rest.

But we are back at it.


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