Should I feed?

[Bøf]

What STRAIN are you growing? White widow from dutch passion
What was the establishing technique? (Were the seed or clone?) seed
What is the age of your plants? 5 weekes
What PHASE are the plants in? (seedling, vegetative or flower) are the plants in? veg
What Technique are you using?
What substrate/medium are you using?(Hydroton, RockWool etc.) Rockwool and hydroton
What is the Nutrient temperature?
What Nutrient's are you using? GH
What is the TDS/EC/PPM you are using? ec 1,2
What is the pH of the "Tank"? about 6, but had some troubles some weeks ago with it being too high.
Are you sure your calibration is correct on your equiptment? pretty sure
When was your last watering? every 4 hours for 15min
When was your last feeding change? (ie. grow-bloom-micro-additional) havent
What size bulb are you using? 5 36W Phillips TLD 865( over 4 plants
What is the distance to the canopy?dunno what that is. Distance to light 5-10cm. Distance to "ceeling" over 1 meter
What is your RH Factor? Huh?? what is rh?
What is the canopy temperature?
What is the Day/Night Temp? (Include flucutaion range) 18C
What is the current Air Flow? (cfm etc.) 1 medium sice fan
Is the fan blowing directly at plants? yes, from 1 meters awey
Is your water HARD or SOFT?relatively Hard
Has plant been recently pruned, cloned off of or pinched no
Have any pest chemicals been used? If so, What and When? Treated once with anti fungal spray when only 5 cm. They had Powdery mildew, but no more.
Are plant's infected with pest's not that I know of

Been running the lights 24/7 and they seem to like it. Had some ph troubles but when sorted the new growth seemed fine til a few days ago. The leafs har a little to light green I think, especially at the tips...I gues I should feed a little more but I dunno. Thell me what you guys think. Added a picture in my gallery named ww of one of the plants.

 

[MynameStitch]

EC 1.2 is way too high for those size plants..... you should get the ppms down to about 600...... are you using the GH3 part? the plants are showing a calcium deficiency. If you had pH issues the plants will not be able to absorb nutrients in the water....... how often are you checking your pH and PPMs? When was the last time you calbrated your equipment? PH meter? Ppm/ec meter?
Have you tested your tap water with your ppm meter? just plain right out of the tap?

You using gh 3 part?
If so you mixed in the micros first?

This is very odd, cause the plants look almost like they have a zinc deficiency going as well as calcium, but I personally have never seen this problem in hydro plants....

What color are your plants roots?

What is your water temps?

 

[Bøf]

Im using gh 3part. Mixed a solution with 1 part micro 1 part veg and one part bloom in water and added a little bit to the water.. the strange thing is, when I first did this, the ec was only 0.8 wich should be fine right? But the ec rised in the last weeks, I gues its because of the water vapouriting(?). Im using a tester wich measures in micro siemens so Im not sure how much 600ppms is..

My tapwater is 0,9micro siemens.
Water temp 20 degrees celcius.

When I mixed the gh 3 part, I first filled water in the bottle, but not sure wich of veg bloom or micro came first... I gues that has something to say?

whoa... yust checked the roots and there is definetly something wrong.. upper 10cms are fine and white, but lower down the roots are brownish/yellow...
Ill flush them First thing in the morning... Its bedtime where I am...Damn...

Plz give me an edvice of controling the ec.. is it to high in the tapwater?? I gues I have to get my testers calibrated.. I borrowed them from a friend, and not sure when they last had a chek.

 

[MynameStitch]

WHat color are your roots?

Hey, this will be sorta hard for me, you may need someone else to help you out, because I don't know siemens........

Ya, you need to mix the micros in first per GH directions......
THat is why your EC raised, when you have root rot your EC raises.

You need to get some SM-90 and h202 ( hydrogen peroxide)

1 tsp per gallon
the sm90 you can listen to the directions on the bottle.

You need to do something more than just a flush, you will need to get this treated or it will kill your plant.

 

[Bøf]

As I wrote, the roots are brownish/yellow. DO I have root-rot?? And can I treat it with only hydrogen peroxide.. I do not live in the states and its kindda difficult to get a lot of the products that you have easy access to. If I order on the internet, sveral weeks will probbably pass by before I get my product..

I will go give my plants a flush now and run the system with hydrogen peroxide before cleaning it with only water.. Should I add a little hydrogen peroxide to the water aften the cleaning? (I mean while the roots are in it)??

I sure dont hope I loose them.. I just "lost" my last harvest to poowdery mildew and that was not fun at all

Thanx for the advice so far Stitch.. I hope your still up for helping though your not an xpert on siemens. Read a lot of your answers and it seems like you know what your talking about.

 

[Bøf]

ok, ive cleaned the system today with bleach.. let it run for a couple og hours and then let it run with tap water for 20minutes 2 times.. I choped of most of the roots as they were considerably darker today than yesterday. Havent fed any nutes to the new water in the res, but added hydrogen peroxide in the amount you suggested.

I may have a suggestion of what went wrong. I use a auarium pump to top feed(dripper). This is on 5 times a day but only 15 minutes. What i´m thinking, is that when the pump does not run, the water inside in the "filter-spundge" does not get any oxygen for almost 4 hours.. This may have givin anaerrobic bacterias the upper hand.. I have a system exactly the same with no problems at all.. only difference is the pump. In the system with no problems the pump havent got any big spundge, and therefore bigger oppportunity to get oxygen while the pump isent running.. just a thought.

Anybody know of a dealer i Europe wich sells sm-90?

 

[MynameStitch]

I hope you rinsed your system well, bleach can leave a residue a lot of times.

h202 depending on how severe the root rot is, can kill it... but a lot of times you need more than one thing to help kill it, there are a lot of products you can use to rid of it besides sm90......

When you removed the root system, was it mostly root hairs you removed?
You want to try to avoid getting rid of the root system at all cost, unless it's totally necessary.
You can use up to 2 tsp per gallon of water 10 ml per 4 liters of water.

How is your setup you have running?
Explain to me how your whole setup.... you have a ebb flow type setup? DWC?

 

[Bøf]

I hope so too. I did not scrub it afterwards, just befor.. scrubed it, let it run witch bleach for 2 hours, washed of with tabwater let run for 20 minutes, washed of with tabwater let run for another 20 minutes, washed of and filled the res. I detected a very high ph almost 9 an hour later.. Could that be leftovers of bleach?! (!!!F***!!!) And that inspite taht I had added phdown..
All the root had a really bad color so I took a desission and cut it all of.

Plastic buckets of 80 L with 2 plants in each in 20cm diamiter netpots. Have 20-25L water in the bottom and airstone, heater, and a pump for the dripers in the top. No eb and flood or dwc. From bottom of netpots to water about 18cm.
Ill ad a picture to my gallery, that might work better.

Damn.. I gues I have to clean it again and get the resst of the bleach(if there is any) of of there. Or is it already too late? I have a bad feeling about all this..

 

[Bøf]

....and what shoul I look for when finding a product that I can treat the roots with, maby I can find something at the lokal garden store tomorrow.. Antifungal something...

 

[MynameStitch]

Depends, but bleach is alkaline.. so there could be a possibilty, depends on how much bleach/ water ratio you used.

Why do you have a heater??? You never want to use a heater when growing hydro..... the water temps need to be kept cold..... 65 F no higher than 70; this may where your root rot came from.

Warm temps cause lower o2 levels and does not allow full nutrient absorption to occur

No it's not too late, you need take a brush, not real rough, but sorta soft and scrub it out while water is pouring into it, you need to remove any left over residue that was still left on the bucket.

Well, that will be sorta hard for me to tell you, because I don't live in europe and I don't any products to well, I need to learn them though....

 

[Bøf]

ok.. ill get clean the res today and remove any leftovers. I will remove the heater, though I am not sure this is what is causing the problem. But out it goes.. The reason for me putting a heater in there in the first place was because I thaught that the water should be obtimal 68(20C) F. I think my water temps without the heater will be around 18 C, but this is ok?
This is the first time I have a go at hydro, so bare with me

 

[MynameStitch]

Yes, your water temps will still be alright, just don't let it get any colder than that.

How often were you checking your water temps? cause it may have gone warmer than that; root rot normally starts when low o2 levels or warm water temps, people have 68 F alot of times with no ill effect, you normally don't want to go over 70F

 

[Bøf]

I think the temp of the res was pretty stable. I have a thermometer in the res and at no time I have seen the temp be any other than 20 C. The heater in the res is an aquarium heater with a thermostat...

-Havent removed the heater though, but have turned it down to 19 C. I have invested in a big ass air pump and a airstone a whole lot bigger then the one I had before, cleaned it all and added 50ml hydrogen peroxide (20L water in the res)

Went to the local gardenstore today but I could not find anything I could add to the water against root-rot. Ill go ask at the danish forum..

Should I wait with the nutes for a week or so, or should I just feed?

 

[MynameStitch]

go ahead and add nutes to the water, but don't add a strong strength until the plants get there white back.

 

[Bøf]

Ill do that then! Thanx alot for the help MyNameStitch!