Who out there changes their res every week?

[hazydreams]

aquashield keeps my plant shit in check

whats your application rate? I'm using 10 ml per gallon on this side its working well. res change out every two weeks.

fwiw i have run entire cycles with out changing nutes. im my experience its rather volatile. it can be done but i get more consistently out of changing the res every 2 weeks.

 

[newhiddengrower]

i mean people who dont change their ress at all can still grow but i noticed its not as healthy near the 5-6 week period.

 

[Lazyman]

Dongle69 only used to change her res when going from veg to flower, and she got 14# out of 6KW in her coco grow with SSH. Freakin awesome for an aircooled grow with no CO2!

 

[crazybear]

I change every week but then again no EC. meter !

 

[ImaginaryFriend]

OO:

I dont change my rez at all.

Yeah.

Me neither.

I usually knock something over or knock loose a fitting every once in a while, so, every six months?

 

[opt1c]

recirculating i changeout every week or so but i use a small rez and the plants drink most of the water in it

rDWC i change at bloom to minimize stretch or a couple weeks into bloom if i want stretch... i also change at the flush

 

[Ursus]

So you like to play Russian Roulette with 4 bullets in a revolver?

Seems most of you do not realize that plants defecate through their roots.

Depending on how many plants (root mass) and rez volume, at some point, the volume of excrement in the rez turns it toxic, and your crop begins to look sickly. Most mistake this for nute deficiencies. A toxic rez quickly effects the roots, which invites bugs, pythium, root rot...

The amount of excrement is minimal during veg, However, during flower, where the hormones rage, the excrement pH is very high. All of a sudden you have problems controlling rez pH and start adding massive amounts of pH down, which does not neutralize the excrement.

The solution is D2W= Drain to waste, but who can afford that with 10G+ rez?

HPA solves all these problems. See my journal to learn about it.

They secrete a percentage of their total carbohydrate product via their roots into the soil to attract symbiotic soil organisms. This is their root carbohydrate exudate that is extra but not a metabolic waste.

 

[delta9nxs]

They secrete a percentage of their total carbohydrate product via their roots into the soil to attract symbiotic soil organisms. This is their root carbohydrate exudate that is extra but not a metabolic waste.


well, what a nice way of saying they don't excrete poo from their little sphincters. here is a little info for the curious.


Date: Fri Feb 15 20:48:13 2002
Posted By: David Hershey, Faculty, Botany, NA
Area of science: Botany
ID: 1013737545.Bt

Message:

Autotrophic plants use light energy to make all the organic compounds they
require from carbon dioxide, water, and about 14 mineral nutrients they absorb
from their environment. Therefore, they don't really produce metabolic wastes
to the extent that heterotrophs do. Heterotrophs digest food. Plants do not
need to digest with the exception of a few species of carnivorous plants.

The term food is not even a term that should be applied to autotrophic plants.
Food is something that is digested and provides energy. Plants are food for
animals and other heterotrophs but they do not produce food for themselves.
Heterotrophs get energy and organic nutrients (amino acids, fatty acids,
carbohydrates, vitamins) from other organisms (food). Autotrophic plants get
energy from light and synthesize their organic nutrients from carbon dioxide
and water.

Probably the only metabolic waste product of autotrophic plants is oxygen,
which readily diffuses out of the stomata on leaves or lenticels on
photosynthetic stems with secondary growth.

Nonphotosynthetic plant parts and photosynthetic plant parts at night produce
excess carbon dioxide which might be considered a waste product. However,
carbon dioxide is essential to plants for photosynthesis. Overall plants absorb
much more carbon dioxide than they excrete.

From wikipedia:

An autotroph[α], also called a producer, is an organism that produces complex organic compounds (such as carbohydrates, fats, and proteins) from simple inorganic molecules using energy from light (by photosynthesis) or inorganic chemical reactions (chemosynthesis). They are the producers in a food chain, such as plants on land or algae in water. They are able to make their own food and can fix carbon. Therefore, they do not utilize organic compounds as an energy source or a carbon source. Autotrophs can reduce carbon dioxide (add hydrogen to it) to make organic compounds. The reduction of carbon dioxide, a low-energy compound, creates a store of chemical energy. Most autotrophs use water as the reducing agent, but some can use other hydrogen compounds such as hydrogen sulfide. An autotroph can produce its own energy through photosynthesis through the inputs of light, carbon dioxide and H2O.


just a little food for thought for those thinking they need to flush the toilet.

 

[abuldur]

I run aquafarms (modified to recirculate) with a controller and biofilters.(150 liters)

With this system i only change the solution once when switching to flowering nuts.

Otherwise i just put 10 liters of ph tape water in the controller every day.

I do not even bother to flush in the end i just cut nuts 2 to 3 weeks before harvest.No ill effects and great economy.

I seems the biofilters (bacteria) and constant aeration deals with root exudate.

Peace

 

[!!!]

What's HPA?

I only change the res when I switch to flowering. Every week I add 5 gallons of water, 5ml bleach (30 gal res) and about 200ppm more nutes and calmag to the res.

I don't think many toxic things build up in the res enough to cause a problem for most people, but changing the res is good because you don't know the composition of the nute solution. You don't know what elements are in the res and which are needed, as strains/phenos take up different nutrients at different rates.

I used to change res often until I discovered bleach. With aeration it keeps the res squeaky clean. For example if a little leaf falls into the water, it doesn't rot. It just gets caught in the filter until removal.

 

[leeky]

I just top off res and then add new nutrients to match amont of ro water stopped final rinse when I couldn't tell the difference that wored with flora nova but after switchin to dynago it definately needs a rinse currently running 150 gallons combined

 

[PetFlora]

HPA = High Pressure Aeroponics.

I respectfully disagree with anyone who thinks the 'exudate' is not toxic to the rez. I have seen the results of it first hand. The problem is one of many as to why I switched to HPA, although my journal title is TAG 2.0, HPA better describes to method

 

[Marshall]

I let reses go 2-3 weeks in veg, then 10-14 days in flower. Usually res changes are done because of nutrient change, additives etc.

right now 200 gallons in flower but I have done this on much larger ops with thousands of gallons of water

 

[teemu shalanie]

I change once a week and run clean drip with ph balanced h2o for 24 hours, then drain that and re fill res with newts for the week.
peace TS

 

[stony2]

once a grow i change it completely and clean out the res, pumps etc. during the grow i basically fill the res, then pump it nearly empty over a couple of watering intervals, and then add new water and nutrients.. using RO water and mineralic nutes the slag buildup is never so high that it gets to be a problem

 

[1quixotix]

Used to do DWC 5 gal bucket.
Airline no stone.
Tap or RO water made no difference.
Partial change out between veg and flower.
Just added back with 1/3 Lucas formula w/ PBP + misc organics.
Yielded like the top 1/3 of ya'll.

I enjoy success in things that people say can't be done, shouldn't be done, or are just plain foolish.
Makes me feel sane in this crazy world.

 

[Kindman69]

I change res every week, but I run a small res (15g). I think growers that add different additives take big risks by not changing regularly. But to each his own brothers, I do know for sure that when shit goes wrong the first thing we do is change the res lol. I just don't want to wait until it does.

 

[Mybud]

No EC/TDS meter, so thought it would be safer to change weekly? Running up to 4, 5gallon buckets, this will be my first time using hydro.

 

[olddirtybastard]

abulder has the right idea. as long as youve got aeration and a biofilter or media colonized with beneficial bacteria res changes are not an issue. my res is 100+ gallons and i only need to change water in between grows. ph and ppm always rock solid.

the hpa guy probably runs a dead res or does not have space for a biofilter/beneficials

 

[PetFlora]

First by keeping an eye on rez pH you can learn when it's out of whack.

I had not changed my rez as I D2W, but I did add some Neptune Seaweed Plant Food (0-0-01) a while back, which may have started some benies growing.

From my last grow, where I was using organic additives/nutes, I placed a large net pot filled with lava rock and enclosed in a paint strainer which gave them a place to grow without effecting the nutes. I still use it as a precaution; good thing too.

Well, I added nutes Saturday pHed to 5.8. This morning I checked and they were 4.1! WTF? Long before adding nutes Saturday, there was some discoloration in the rez and some build up along the bottom and sides below the water line, so I took out the net pot and thoroughly cleaned it, the rocks, the paint strainer, and of course the rez. I added the nutes back (straining them) and checked pH. It was 5.8.

Moral of the story, watch your pH and clean your rez, at least occasionally.

hth