New growth is yellow? trying to figure this out..

[LuiiV]

let me raise the lights then. i didnt think it would be light burn. i thought it would be some sulfur dificiency or iron..

 

[LuiiV]

whats a good alternative for cal mag? because thats not a product thats usually found here... like i said i improvise with alternatives...

 

[Olive Drab Green]

Dissolving epsom salts in water. Use a ratio necessary for your size pot. Bone meal for calcium, too. Also, order cal-mag off of Amazon.

 

[Olive Drab Green]

I re-looked at it and edit my post. But 8 T5s 4 foot tubes 54W each.

But those watts cover a larger area. In any case, I'm not trying to jump down your throat, sorry.

 

[Olive Drab Green]

And, OP: Switch to tap, or 50/50 tap-distilled if your chlorine content is particularly high.

 

[Olive Drab Green]

Yeah, I edited my post I never really thought about that. Didn't think think it would be different but you make a lot of sense. Doesn't look like a cal/mag issue less its been there for a while and got worse. And I think that starts on the lower leaves first.

It does look somewhat like a mag issue, but not likely in that pattern.

 

[LuiiV]

theres about 3 gallons of water and i added about 2 teaspoons of epsom salt because i thought i would be some kind of mag sulfur deficiency.. ill raise the light up too and see if that helps in case of light burn.. i really didnt think it would be light burn since most people put their cfls about 2-4 inches away from their plants.

 

[LuiiV]

guys the new growth in the middle is growing really thin and yellow.. you guys sure its from the light? and cal mag cant be found here. so i need some alternative for cal mag. i added epsom salts but if its deficient in calcium i need to be able to add something else to it..

 

[VenomGrower6990]

I believe you can use regular tums with calcium in a pinch. Just grind them up.

 

[Olive Drab Green]

I believe you can use regular tums with calcium in a pinch. Just grind them up.

They are just calcium carbonate, right?

 

[VenomGrower6990]

They are just calcium carbonate, right?

Yes sir. And sucrose (sugar).

 

[skunkwreck]

When I grew with cfl's I used 4 x 55 Watts kept at one inch above my plant.....never got light burn...I'm thinking you have a deficiency of some kind...I keep my 400w just 12 inches from my plants with no burn...sometimes it's all about the air flow so I'm still thinking deficiency .

 

[dgthumb]

hello my first post to this website..

before i say anything i would like to say that i am from venezuela. and normally the products usually found in the US cannot be found here at all. so please keep that in mind when trying to tell me what name-products to buy, its not found here, and we dont make dollars to buy em overseas. so i improvise with whatever else i can find. such as baking powder for pH up and vinegar for pH down. epsom salts.. nitrogen pills that are easily-soluble, with an 8-1-1 ratio. and another npk product with a 1-3-2 ratio, and liquid worm castings.

anyway onto the problem..

i have a nice lil cannabis plant that im growing hydroponically. its 22 days old since its sprouted. im giving it 18/6 lights. i have 4 30 watt cfls right now, about another week im gonna hook up my 400w mh bulb for it. the pH of the water stays at a constant 6.0. room temperature stays between 68-80 degrees throughout the day because of the tropical country. i have a fan that moves the air around and gives it a gentle little breeze. i feed the plant 1/4 strength nutes. this monday i will change the water and bump it up to 1/2 strength to see how it reacts. i have 3 small air pumps, all 3 together giving off 8 liters/minute of oxygen. not sure if thats enough but as of now i havent seen any problems with the roots.

my problem is that the new growth has been a lime green/yellow this past week and i cant seem to figure out exactly what the problem is.. its still growing but not as efficient as before. im not sure if i am leaving out any other info that would be helpful. so please, if in doubt ask and i will respond as quick as possible with more information.

Oh! and in the pics you will see the first true leaves' tips burned. that happened on day 8 and i transplanted to my 5 gallon bucket and since then it has stopped dying and has grown nicely since, till now, that im seeing light-colored growth.

and remember im not in the US. i improvise with other products that could be alternatives to what you guys use.

Check the ph lately?

 

[Olive Drab Green]

It could be Mg. Sorry for the aggressive responses. I really need to quit drinking. But, that pattern still makes me think light burn. Otherwise, probably mag def.

 

[Olive Drab Green]

My theory is also backed up by the cupping leaves. Heat stress due to lights right up its ass.

 

[Olive Drab Green]

That said, you're in hydro and should add a little cal-mag or the like.

 

[LuiiV]

i check the ph every morning and every night. it stays at a constant 5.9 to 6.1. and i raised the lights some in case of light burn. and added epsom salts in case of sulfur mag deficiency. and in case of calcium then i guess ill try to find some tums, highly unlikely though because this country is in such a crisis that we dont produce or import any name-products.

 

[LuiiV]

could i use flavored tums? because i think my grandma has some of those hahaha. but regular tums i doubt i could find some. i would have to run all across the city just to see if i could maybe run into some.

 

[Olive Drab Green]

i check the ph every morning and every night. it stays at a constant 5.9 to 6.1. and i raised the lights some in case of light burn. and added epsom salts in case of sulfur mag deficiency. and in case of calcium then i guess ill try to find some tums, highly unlikely though because this country is in such a crisis that we dont produce or import any name-products.

..Where in the hell do you live, dude?

 

[Olive Drab Green]

What are the ingredients in your flavored tums?