calcium def ithink? Any IDEAS??

[LifeCycle]

sup peeps got a lil problem not sure how to diagnose


HYDROPONICS

How long has this problem been going on? 2-3 weeks
What system are you running? waterfarm drip
What STRAIN are you growing? The Pure /flying dutchman
What was the establishing technique? seed
What is the age of your plants? 4 weeks into flower
How tall are the plants? 30 inches
What PHASE are the plants in? flower
What Technique are you using? scrog
What substrate/medium are you using?(Hydroton,
What is the Water temperature?68-72
What color are your roots? dont know scrogged
What Nutrient's are you using? advanced nutes 2 part a+b bloom
What is the TDS/EC/PPM you are using? 1500-1800
What is the pH of the "Tank"? 5.5
Are you sure your calibration is correct on your equiptment? yes
When was your last watering? daily
When was your last feeding change? (ie. grow-bloom-micro-additional) 3- 4 weeks ago
How often do you clean your system: example: weekly
What size bulb are you using?1000w hps
What is the distance to the canopy? 2 feet
What is your RH Factor(Relative Humidity)? 20
What is the canopy temperature?81f
What is the Day/Night Temp? 81day 70 night
What is the current Air Flow? (cfm etc.)?? fans
Is the fan blowing directly at plants? no
What water are you using? Reverse Osmosis (RO)? Tap? Bottled? Well water? Distilled? Mineral Water? tap
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
__________________________

 

[moonymonkey]

have u ever run this same system before,same medium,same watering tech??same tap water as a source? also 1,oo0 watt 2ft distance,is it air cooled?

 

[LifeCycle]

yes i have. the light is on a rail

 

[moonymonkey]

to me looks lik som kinda interferance of nutrients,are thoses leafs black in first pic on edges? im not hydro person,but trying to help ,until hydro person comes along,im leaning towards ph..looks lik multiple def.s...

 

[Delta Force]

not a pro but I'd say calcium........def looks just like the cal def photo in the diagnose thread. Either def.......or lockout.......my vote is straight lock out cuz of severity of it........check PH?

okay i looked into ur descriptions more........what conversion is the ppm's at or better yet you got EC? seems high if ur at the .5.......def in hydro i'd say at week 4. could be burn after seeing that number....you run em that high usually?

 

[Buzz Lightyear]

Reduce ferts to maybe 1000. Raise ph closer to 6.

Peace,

Buzz