1000w hps is overworking my leaves

So I have 2 grows going currently. I'm actually helping a friend grow but I'm basically doing everything for him. I gave him a few clones from my genetics and got him up and running under a 600w hps. Basically we have the same strains going and he's running the same exact nutrients even flowered the same time so he's on my schedule. He comes over everytime I feed and I give him a few gallons out of my res. So PPM/PH/Ratios are all the same. Even his environment is very similiar to mine 72-78f 40-55rh. The thing is his cookie plants are looking fine nice and green but mine are getting hit with a really bad cal mag defeciency(yellow and brown leafs). I currently have the light almost 30" away(moved it higher right now) It was at 18" before. I raised to 24" but the leaves were still rapidly dying with the calmag defeciency I thought raising would help but it's still rapidly losing leaves. And it's mainly leaves that are exposed to a lot of light. I haven't feed flowering nutes in almost a week since I thought it could've been nutrient related. I'm in a 5x5 tent Using a 1000w and he's using a 600w in a 2x2 closet. I'd figure his plants are getting blasted with a lot of light like mine but his aren't having the same problem as me. I feed calmag last night at 2ml/g and today the defeciency is even worse. Same thing happened on my last harvest the cookie plant got stripped for so many leaves. I thought it was lockout or something it eventually stopped when I went super heavy on the nutes and still got amazing bud just lost yield for sure. I'm now 90% sure it's my light being too strong. My other strains don't have a problem only my cookies. What would be my best option here? Keeping feeding at higher dosages? Stay at my normal dose? Or stop feeding for a little bit? Is my light now too far at 30 inches? Was it the light over working my leaves and making the plant uptake more nutrients then what my soil had? Maybe that's why my plants are developing faster then his and showing defeciency (eating a lot of nutrients)? I'm trying to understand this so this doesn't happen on my next run. Im sure it's definitely light related and not PH or nutrient related. I never got any light bleach or anything.

Here some info bout my grow
5x5 tent
1000w super hps hortilux bulb with quantum ballast.
9 plants
3 gallons pots
FFOF SOIL.
Feeding: bloom base, sweetener(molasses), floralicious(enhancer), rock resinator(PK booster) and calmag.
If there's anything I left out let me know.

Maybe too much PK calcium and mag and not enough nitrogen to sustain growth under the high intensity lamp.

I would flush and put only a grow ratio back in at a moderate concentration and be patient.

It is possible your friend has very different micro climates around his leaves in the closet than you have in your room despite the main temp and humidity stats.

I would also look at environment. Stale spots. Hot spots. Exhaust and intake flow. Etc. environment is the main thing.

MichiganMedGrower said:

Maybe too much PK calcium and mag and not enough nitrogen to sustain growth under the high intensity lamp.

I would flush and put only a grow ratio back in at a moderate concentration and be patient.

It is possible your friend has very different micro climates around his leaves in the closet than you have in your room despite the main temp and humidity stats.

I would also look at environment. Stale spots. Hot spots. Exhaust and intake flow. Etc. environment is the main thing.

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But if too much PK and cal mag were the case why didn't any of his plants get affected by it? My other strains are ok.. The same exact water/nutrients go in his pots. You could be right about nitrogen because I'm starting to notice a N defeciency on top of the cal mag problem. he's hitting 150w per square ft with the 600 and his reflector is less than a foot away I'm hitting less then 50w per sq ft with my reflector at 30" So wouldn't his light intensity be the same if not more?? I don't know how micro climate works so that could be a factor

Well first. Cal-mag is not a combined issue.

Calcium shows as rusty spots at the top of the plant and magnesium shows at intervenal yellowing and the necrosis starting at the lowest fan leaves.

The leaf you show has multiple deficiencies. Nitrogen phosphorous etc. It's all locked out.

No 2 grows are the same despite sharing your resivour water. What I mean by micro climates are his leaves are obviously seeing different environment than yours and his roots are still uptaking properly.

And I guess he has a lot more intensity than you. 3x what I would even recommend so here you have me stumped too.

I would still flush and put a mild dose and ratio back for now.

Also look into salt buildup and drainage. I build up salt quickly in my 3 gallon pots of ocran forest and I don't use boosters or additives.

When I see the calcium buildup in the drain holes. I leach with only a half gallon of fresh water and let it sit and soak up the salts for a little while and then run a milder Grow solution through to runoff. I want to see clearer not mucky yellow runoff.

So many variables. I use 20% added large perlite in my soil to help with drainage or I end up burning my plants some.

Good luck. Hope this helped a little.

I max out at between 45- 55 watts a sq.ft. in flower.

Thank you for your help what's weird is that the plant directly under the light did it first when I moved it to a corner that wasn't getting as much light it stopped overnight. Still today it's not showing any signs of doing that deficiency again. But the other plants that got moved closer to the center start getting the deficiency. That's why I was so convinced it wasn't a lockout. But I'll definitely try to give flushing a try.

MichiganMedGrower said:

Well first. Cal-mag is not a combined issue.

Calcium shows as rusty spots at the top of the plant and magnesium shows at intervenal yellowing and the necrosis starting at the lowest fan leaves.

The leaf you show has multiple deficiencies. Nitrogen phosphorous etc. It's all locked out.

No 2 grows are the same despite sharing your resivour water. What I mean by micro climates are his leaves are obviously seeing different environment than yours and his roots are still uptaking properly.

And I guess he has a lot more intensity than you. 3x what I would even recommend so here you have me stumped too.

I would still flush and put a mild dose and ratio back for now.

Also look into salt buildup and drainage. I build up salt quickly in my 3 gallon pots of ocran forest and I don't use boosters or additives.

When I see the calcium buildup in the drain holes. I leach with only a half gallon of fresh water and let it sit and soak up the salts for a little while and then run a milder Grow solution through to runoff. I want to see clearer not mucky yellow runoff.

So many variables. I use 20% added large perlite in my soil to help with drainage or I end up burning my plants some.

Good luck. Hope this helped a little.

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I've had the exact same problem using a spectrum king 400 led. I have two tents side by side one with a 600 and the other with the led, same strains, the only difference being the different lights. I read over on IC that you have to up nutrients to compensate for the increase in the plants metabolic rate under higher intensity lights but I haven't had a chance to start over with healthy plants to test it out

KingMufasa87 said:

I've had the exact same problem using a spectrum king 400 led. I have two tents side by side one with a 600 and the other with the led, same strains, the only difference being the different lights. I read over on IC that you have to up nutrients to compensate for the increase in the plants metabolic rate under higher intensity lights but I haven't had a chance to start over with healthy plants to test it out

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Of course. More growth more needs. But more problems like salt buildup and nute imbalances in the medium can result.

Everyone here keeps saying led's make plants need more mag. I think that it is actually nitrogen needed. Cal mag is usually calcium nitrate mainly. Nitrogen.

And I think it is with any intense lighting.

MichiganMedGrower said:

Of course. More growth more needs. But more problems like salt buildup and nute imbalances in the medium can result.

Everyone here keeps saying led's make plants need more mag. I think that it is actually nitrogen needed. Cal mag is usually calcium nitrate mainly. Nitrogen.

And I think it is with any intense lighting.

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I agree. I don't think it's LED specific. It's just the intensity and I'm not sure exactly what adjustments will fix it yet. I'll report once I get to run new healthy plants

First of all your wasting your time with a Super HPS Hortilux and that ballast, its only pushing 50-60hz, your bulb can handle 120hz. No one seems to get this, it blows my fucking mind. My Super HPS bulbs are both running on 120hz ballasts, the light difference is very noticeable. But anyways, I personally would add some nitrogen and some sort of silica.

ipeeinpools said:

First of all your wasting your time with a Super HPS Hortilux and that ballast, its only pushing 50-60hz, your bulb can handle 120hz. No one seems to get this, it blows my fucking mind. My Super HPS bulbs are both running on 120hz ballasts, the light difference is very noticeable. But anyways, I personally would add some nitrogen and some sort of silica.

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What ballast are you talking about? I use galaxy Grow amps with my super hps'.

Platinum Hortilux? Think it's disconued.

I'm running a 1000W Hortilux on a magnetic ballast that's a 12 to 16" from my canopy. Just measured. It's on a light rail tho or I'd have it another 6" away.

@ipeeinpools most digitals give the lights around 20,000Hz which causes resonance in the bulbs and very few can handle that kind of vibration which is why so many bulbs fail in digital ballasts. Magnetics deliver 60Hz to the bulbs and that's what the vast majority of bulbs are designed to run on which is why I'm still using a 400w Hortilux conversion bulb 16 years later. It runs off an HPS ballast and plants still veg just fine off it.

The 1000W I'm using is also a conversion bulb that is actually 940W but designed to use a 1000W MH magnetic ballast to give me HPS light. It's an Ultra ACE EN, NH 940B/HTL/EN and cost almost twice as much as their Super HPS that runs off a magnetic HPS ballast but I don't have one of those. Also the size of a football and was worried it wouldn't fit in my new open reflector but it made it. I use their Super HPS in my 400W when a 400 will do.

@Sam1510 . You should learn a little punctuation so all your text isn't in one big run-on block. Got a headache reading your OP.

Sam said hes running quantum ballasts with his 1000w, they max at 60hz and probably dont even hit that. Super HPS bulbs are made to be run at 120 hz, same as DE bulbs. I actually started a thread on a full grow using the super hps bulbs with eye hortilux gold ballasts. Im on day 2 of flower lol. But i want people to see what those bulbs can do running at the right hertz.

So where do you find out what hertz the ballast delivers to the light? Line voltage in north america is 60Hz but digitals ramp that up which is the problem with most of them even the top grade ones. I have all magnetics and if I ever upgrade or need more lighting I'll likely go with these new-fangled COB lights once they work the bugs out of them and the price comes down to something reasonable.

No link in your sig to the grow of which you speak?

Hortilux lists the hertz on their website, 120000 frequency output. I actually had to upgrade my breaker to 240v just so my kitchen's outlets would stop buzzing lol. Plus i couldn't keep one ballast on a single 15A while running 120V without it tripping

@OldMedUser Is COB a kind of LED? not too familiar with the LED's, my only experience is with HID lighting. Also updated my sig, haven't been on rollitup in a few years, but I'm hoping the hortilux grow lives up to the logic in my head lol.

ipeeinpools said:

First of all your wasting your time with a Super HPS Hortilux and that ballast, its only pushing 50-60hz, your bulb can handle 120hz. No one seems to get this, it blows my fucking mind. My Super HPS bulbs are both running on 120hz ballasts, the light difference is very noticeable. But anyways, I personally would add some nitrogen and some sort of silica.

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His digital quantum has a frequency output of 60hz?

Can you explain to me, how a hortilux plat/gold can make more light over a digi quantum?

SPLFreak808 said:

His digital quantum has a frequency output of 60hz?

Can you explain to me, how a hortilux plat/gold can make more light over a digi quantum?

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I would like to know too. I asked about it above but got no response. There was a video a few years back with them running the Super hps with a platinum Hortilux ballast. And it was much "whiter" looking.

But that is discontinued I think. Wonder why?

ipeeinpools said:

@OldMedUser Is COB a kind of LED? not too familiar with the LED's, my only experience is with HID lighting. Also updated my sig, haven't been on rollitup in a few years, but I'm hoping the hortilux grow lives up to the logic in my head lol.

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Yeah COBs are LEDs. Stands for Circuit On Board I believe. I don't know much about them but they seem to be the cat's meow as far as new lighting tech goes. A lot of DIY going on with them and electronics is not my strong suit.

Mainly the same benefits LED users claim. Lower heat and power use but a lot less bulbs and better spectrum. I'm not an early adopter kind of guy and still use XP Pro on this rig. In a few years the price will be way down or something new and improved will come along and I can pick up COBs dirt cheap.

I get same type issue on mine. Its one good sized broad flat topped plant, the portion right under my light looks N defficient. The corners out from being direct under light look fine.

Its 18" i wished for 6 more but mis estimated hight when i LSTed her in late veg... thats all the room i can give her. I always switch right go bloom nutes right at 12/12 change after a couple straight waters at end of veg and one after the flip. Im thinking next round go first week to two on veg nutes....