Please help!!! Calcium deficiency!! Hydro

Ok first a little about my setup...I'm have a hydro bucket system with 2 600 wt hid....ok I have 10 plants and I have only 1 that is showing signs of calcium def(yellow spots that turn brown and the leaves are curling downward) I researched the deficiency and found that Epsom salts can clear the problem. My problem is that I am scared to put into my res for all my plants when there's only one with the problem. HAS ANYONE HAD THIS HAPPEN... If so is it safe to put inside my res or do have any alternative way of feeding the Epsom salts to only the one. I read to put 1 tbl spoon/gal. PLEASE ANY INFO WILL BE USEFUL. THANK YOU

Dont think that's calcium def also Epsom salts are for magnesium def.

My plants look just like these:

uksecretsensi said:

Dont think that's calcium def also Epsom salts are for magnesium def.

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[h=2]Calcium Deficiency[/h]Problem: Signs of a cannabis calcium deficiency can be hard to pin down since calcium deficiencies are often accompanied by magnesium, iron, and other deficiencies. However, some of the major signs of a calcium deficiency are in the leaves which will display dead spots, crinkling, spotting, or small brown spots. Another sign of a cannabis calcium deficiency is new leaves will appear small and distorted with curled tips The insides of the plant and well as the flowers/buds may show signs of decay. Roots may show signs of bacteria and may be dying off or be under developed.
Solution: If the pH of your root zone is off, then your cannabis cannot properly absorb calcium through its roots so the first step is to ensure that you have the correct pH for your growth medium. Learn more about pH and cannabis. Different strains of cannabis tend to have different nutrient problems, but calcium, magnesium, and iron deficiencies often appear together in cannabis. Therefore many growers decide to purchase some sort of Calcium-Magnesium (often called Cal-Mag) supplement for their grow room in case this common deficiency appears. I have listed some available Cal-Mag supplements that I have used along below with some general information about each one. After supplementing with Cal-Mag and correcting the pH, you should expect to see new healthy growth within a week.

Right advice time...... Check your ph. Also have you got red stems?

uksecretsensi said:

Right advice time...... Check your ph. Also have you got red stems?

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Nope no red stems and the PH is always on point....

Red stems can be mag def or nitrogen overfert. Tips curling up is mag def, tips curling down is nitrogen overfert overwatering or under watering. Also adding more mag can give your plants n toxicity if your not careful as mag is what makes your plant take up more nitrogen. Calcium def?? Well I have grown in hydro for years never used cal mag and never had calcium def. I have had mag def and micro nutes def before which Epsom salts did sort out but it won't sort out calcium def as Epsom salts dont contain calcium.

uksecretsensi said:

Red stems can be mag def or nitrogen overfert. Tips curling up is mag def, tips curling down is nitrogen overfert overwatering or under watering. Also adding more mag can give your plants n toxicity if your not careful as mag is what makes your plant take up more nitrogen. Calcium def?? Well I have grown in hydro for years never used cal mag and never had calcium def. I have had mag def and micro nutes def before which Epsom salts did sort out but it won't sort out calcium def as Epsom salts dont contain calcium.

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My leaves are curling up at the tips with dots on them and I just looked it also has red stems u are right, pls help what should I do pls pls....

That is mag def mate I am 100% on that. Use Epsom salts 1 tablespoon per gallon. That will sort your problem.

Also dont worry about the other plants as if 1 has it only a matter of time b4 the others follow. Add it to your res at the dose I gave you.

uksecretsensi said:

Also dont worry about the other plants as if 1 has it only a matter of time b4 the others follow. Add it to your res at the dose I gave you.

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I have a 55 gallon resivoir so do I put 55 table spoons and are we sure that it won't destroy my baby girls

Put in 40 just to be on the safe side after couple days if no change up the dose to 55. Leaves that are already affected won't recover so look at your new growth if it is ok you av done the job. Check your ph after adding Epsom salts.

And no your girls will be fine. Mag is an essential element for growing without it u will run in to bigger problems.

And dont always use it only use it if you need it(when u notice symptoms appear)

uksecretsensi said:

And dont always use it only use it if you need it(when u notice symptoms appear)

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WOW THANKS SO SO MUCH DUDE U SAVED ME AND PUT MY MIND AT EASE, i went ahead and put 40 and I will see if I see a change, how long do u think it will take to show signs of emprovment so I could kno if I need to add more????

uksecretsensi said:

And dont always use it only use it if you need it(when u notice symptoms appear)

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Do I use it when I see read stems, is that the 1st sign and the doted and curling leaves would be the 2nd sign??? because to come to think of it I always had a few plants in every grow that had those red stems but this is the 1st time the leaves doted and curled up....

Few days mate. Check new growth not old growth as old growth will not recover. You will know mate believe me I notice the difference in 2 days.

No dont give when stems are red as this can also be nitrogen overdose. Give when leaf tips start to point upwards.

Red stems and leaves curling upwards=mag def. Red stems and leaves curling downwards= nitrogen overfert

uksecretsensi said:

Red stems and leaves curling upwards=mag def. Red stems and leaves curling downwards= nitrogen overfert

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Thanks dude that's all I need to kno also I will start keeping a bottle of cal mag mag def and will flush as soon as I notice nitrogen overfert, thanks again dude u been a blessing thanks so much.....