Calcium deficiency I cant correct. wtf

[yeah]

I have been running a 8 600 watt lights with 4 3x6 ebb and flow trays 1 plant per square foot. The plants start in 3x4 inch rockwool cubes and are vegged in a separate room till they are 20 inch's then moved to the flower room where they going into hydroton and placed on a coco mat. There are two separt 100 gallon resiviors. Each res supplies 2 3x6 table. Im running gh lucas formula with koolbloom liquid and h2o2. I have done this for 2 other cycles without any problems. Now half the plants are showing calcium deficiency. I tried to add techniflora CalMag to the res and within 36 hours there was a layer of hard calcium on the bottom of the resi. Any ideas what is pulling the calcium out of water? The plants are looking worse everyday despite 2 water changes with complete flushes.
http://www.icmag.com/ic/gallery/showphoto.php?photo=784828&ppuser=32430
http://www.icmag.com/ic/gallery/showphoto.php?photo=784831&ppuser=32430
http://www.icmag.com/ic/gallery/showphoto.php?photo=784830&ppuser=32430

HYDROPONICS/Aero Ponics/Coco/Soiless/

How long has this problem been going on? 2 weeks

What system are you running? Ebb and flow

What STRAIN are you growing? Humbolt Fog

What was the establishing technique? clone

What is the age of your plants? 10 weeks

How long have they been in there mixture they are in now? 3.5 weeks

How tall are the plants? 30-36 inch

What PHASE are the plants in? flower

What Technique are you using?

What substrate/medium are you using? hydrotron

What is the Water temperature? mid 60's

What color are your roots? White? Brown? bright white

What Nutrient's are you using? GH
How much of each nutrient are you using with how much water? 800ml micro, 1600 bloom, 800 ml koolbloom, 300 ml h202

How often are you feeding? 4 times a day

How often are you giving nutrients? 4 times a day

If flowering, when did you switch over to using Bloom nutrients? 2nd week of flower

What order are you mixing your nutrients? Bloom, Micro, koolbloom, h202

What is the TDS/EC/PPM you are using? Hanna

What is the pH of the "Tank"? 5.7

Are you sure your calibration is correct on your equiptment?yes

When was your last feeding change? yesterday

How often do you clean your system? once a week

What size bulb are you using? 600

What is the distance to the canopy? 18 inch

What is your RH Factor(Relative Humidity)?35-50

What is the canopy temperature?68-72

What is the Day/Night Temp? max 78 min 62

What is the current Air Flow? 1400 max

Tell us about your ventilation, intake exhaust and when its running and not running ? Passive intake from two 6 inch ducts my exhaust is a 10" max can with a cfm of 1400. I have it running on a temp-2 so it runs at 25% capacity umless it hits 82 then goes to full speed

Is the fan blowing directly at plants? yes

Is your water HARD or SOFT? Hard

What water are you using? Reverse Osmosis (RO)? Tap? Bottled? Well water? Distilled? Mineral Water? RO ppm 18

Are you using water from a water softener?no

Has plant been recently pruned, cloned off of or pinched no

Have any pest chemicals been used? If so, What and When?no

Are plant's infected with pest's no

 

[Guest 18340]

Is this the same strain as the other 2 times?

 

[yeah]

yes. the only change made is that im running liquid koolbloom instead of the powder koolbloom.

 

[Guest 18340]

Well, common sense would dictate that since the only thing you changed is the koolbloom then that's the problem, but I just don't see how. The liquid isnt as strong as the powder, unless you added too much? How much per gallon did you add? Whats the ppm of your mix?

 

[yeah]

except that its only hapenning to 1 res and the plants its supplying. so im kind of going out on a limb but im wondering if there is a problem with one of the pumps and its sending out an electrical charge that is pulling the calcium out of the h2o

 

[Guest 18340]

That would be wild! I guess switch out the pump and go from their? If you don't mind keep me posted on if it was the pump.

 

[OC80]

My nutes are almost identical and im having this issue with a more-sativa pheno PPP. None of the other strains or other PPPs are having issues. Little rust like spots on one of the middle nodes leaves. No where else though... tuned in for a solution.

Edit: saw the response about the pump. I know for sure that cant be my issue, as 7 others are on this pump and are growing flawlessly.

 

[JamieShoes]

tried changing the feeder pipes..all the drippers are dripping?


just putting it out there....good luck mate

 

[EvilTwin]

yeah,
Are you adding each nutrient separately stirring well in between?

Another thought I had was that you could put a heater in the res to bring the temps up. Solids stay in solution easier in warmer water.
ET