Skunk Special in hydro needs help

[SwedishInka]

I have two sic Skunk Special from feemaleseeds that i would like som help with.
I am growing them in a Atami Wilma hydro with hydrocorrels as medium. The leaves seem to get burned as they get older. The plant still grows good. The skunks are companied in the hydro by two grapefruits, and they dont have this problem.

400w Philips hps.
Canna Aqua A+B nutes with a little Rizonic (EC of 1.50 in the tank).
They get fed 4 times a day (06, 12, 18, 24).
I clean the tank and mix new nutes with a 14 day interval.
Ph 5.4 - 6.3 (i have to adjust this almost every day).











I greatly appreciate any help!

 

[resinryder]

Flush it.
Back off the nutes to about 1.2 ec. (just to let it regroup itself. Then go up from there as needed.)
Keep ph in the 5.5-5.9 range.
Add Cal-Mag at the rate of 2 or 3ml/gallon of water. That should bring it back around.

 

[SwedishInka]

Thanks for the quick help. I do not have any cal-mag at the moment. But i do have a bottle of CANNAZYM that i have not used. Can this help me?

 

[MynameStitch]

god thats high PPM's like resin has stated flush them, they are burned to hell!

that ppm's sould not excede around 600 for that size of a plant, no more than 800

 

[Blackmelo]

there might be a few reasons for your plants looking like they are:

1) you are feeding too much N which is locking out calcium and magnesium

2) you are lacking calcium and magnesium

3) your ph is wrong

4) low reservoir temps can make it difficult for the plant to absorb nutes.

5) this one was mentioned to me about a year ago: Adding too much ph down can lead to too much phosporous(as it is phosphoric acid) and thus also lock out cal and mg. You could try a ph down meant for aquariums if you are worried this might be the cause.

Having mentioned all that and actually having grown a plant that looked identical to how yours is looking I will say that your most likely culprit is nr 1.

 

[Blackvelvet]

Low ph is probably your problem. Keep it closer to 6. I suggest using 2.2 ml a + b per liter of water (8.4 ml per gallon). This would give you 150 ppm nitrogen. This should be plenty for good growth. I am unsure what ec this works out to be. When you switch to flores, add 1/8-1/4 teaspoon epsom salts per gallon of water.

 

[MynameStitch]

I think his ppm's are to high and it's locking out nutrients, those plants re not that big not to mention they are different sizes which makes it more difficult to put high ppm's in a res with bigger plants it will cause burning.

I think he should flush it out first adjust ph and add less nutrients and go from there, i know there are nutrients being locked out, it looks like a case of to much of certain nutrients locking out others.

 

[MTF-Sandman]

I'm with Stitch on this one...IME lockouts usually cause funky patterns in the leaves like that. Hell, I flower with 1200 max with CO2, so I seriously doubt if those plants can handle 900.

Might wanna also check the roots on that plant to make sure they're healthy...

 

[SwedishInka]

Thank you all. Solid help. The plant is looking better now, they really took a punding there I guess... But I have surely learned my lesson!
The skunk is the one on the closer row to the right. You can still make out the old burned leafs.