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Black spots on the bottom of tomatoes. Blossom end rot?

shigshwa

shigshwa

On this ananas noire I'm growing, every fruit develops a dark spot or two on the fruit at some point. Is this blossom end rot? Doesn't seem like it.
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Yup, you should definitely add more calmag. Are you using soft, hard, or RO water? RO water usually doesn't have sufficient levels of calcium/magnesium, but whichever source of water you are using needs more calcium in it.
 
Hard, 150 ppm. Is that enough? I usually add enough calmag to raise it to around 400-600 ppm, is that too much?
 
It could be too much. Blossom end rot is usually caused by a lack of calcium, but if the levels are too high I would suspect that it might cause some issues as well.

I would try and get a second opinion on this.
 
What kind of PPM meter are you using? Are you hydro?

What he said about RO water, even filtered tap (filtered soft) water can have low levels of calcium. I've been in my Apt for 2 years and we have no problems with calcium deposits. Leads me to beleive that the building may be filtering the water for each unit or something. I dunno
 
BringTheFlameThrower said:
What kind of PPM meter are you using? Are you hydro?

What he said about RO water, even filtered tap (filtered soft) water can have low levels of calcium. I've been in my Apt for 2 years and we have no problems with calcium deposits. Leads me to beleive that the building may be filtering the water for each unit or something. I dunno
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Kind of a cheap meter. My friend gave it to me, he said it was from those ZeroWater kits. Yes, I'm hydro. The water reads about 9.5 for ph, 150ppm for TDS.

I added about 2 teaspoons per gallon, following the accelerated formula on the back. Is 500 extra ppm of calcium and magnesium really too little still? That must mean it uses a whole lot. One thing I typically notice is that the ppm rises about 200 ppm between water changes. I'm running about 1800-2000 ppm for the 26 inch plant.
 
BER is typically caused by lack of calcium because of uneven watering, too much at any time or not enough at any time, or any combination of both. BER is not usually caused by the lack of calcium in your grow medium unless you're using a bare bones medium. And, when grown in ground, plants will exhibit BER in the early fruits and then they will grow out of the problem when watered properly.
 
neoguy said:
BER is typically caused by lack of calcium because of uneven watering, too much at any time or not enough at any time, or any combination of both. BER is not usually caused by the lack of calcium in your grow medium unless you're using a bare bones medium. And, when grown in ground, plants will exhibit BER in the early fruits and then they will grow out of the problem when watered properly.
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I'm growing using hydroton. I'll try using no calmag and see what happens. My oldest fruits have rotted, the new ones are fine for now.
 
Oh, additionally, the older leaves have this spotting on it, and it's also present on the leaf tips. Not all of them, but a good number do.


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