7900 ppm, 15.8 EC ?????????

[brightskies]

I've been trying to veg with my new CO2 set-up. With several strains that I don't know well. I just got the CO2 setup so I figured I might as well put it to use right away in veg.

I read a lot of posts- some say it's great, others not so great. I had to find out for myself.

This is my second attempt to veg with CO2- I lost the last crop in veg because I thought I was overfeeding them.

On this run I discover I was actually under feeding them. Some of them are only now starting to look good after 7 weeks of increasing the nutes, now at 7900 ppm's. That's hanna .5 conversion; 15.8 EC.

I never heard of that happening. I must be doing something wrong.

My Tri-Meter is calibrated, it's not that.

The majority of them are looking better so I just flipped them to 12/12 a couple of days ago. One plant in particular is looking fantastic now.

I'm running ebb & gro buckets, 14 plants with 2 1K's. 85-90F canopy, 40-55% RH, chilller. Canna Aqua nutes, CO2

I'm lost!

 

[stoney917]

dude 7900 ppms????? must look like tar or sand lol.... how much nutes are ya mixin ml per gallon????? hopefully somone who uses the same nutes can help ya but if my res had nething close to them readings i would be flushing and buyin a new meter,,,, scatchin my head to.... best advise i can give ya is to fuck what ur meter says keep uppin the nutes slowly and feed ur plants what they want to keepem happy but 7900 damn.... never heard of plants likin that..

 

[Ursus]

If you are 100% sure it's not your meter, then holy god you are poising your plants? I have the same combo meter by Hanna. 99% of the time people are adding TOO much to their plants, its weed , it doesn't take grotesque amounts of nutrients to develop like some fruit trees and vines. How did you discover you were underfeeding them? A pic would be nice! Hope this helped you a little

 

[BongRipkenJR.]

7900 would kill any ganja plant.

I think it is time to get a 2nd opinion. Ask a friend with a TDS pen to check it. Or you can go buy a sunleaves TDS pen for $20. I think your meter is broken. Are you reusing your medium? It might have salts built up on it. Also, you can try drip clean from start to finish. I was getting a high runoff PPM and after I flushed it I started adding drip clean. Seems to be working very very well!

 

[brightskies]

I'm glad somebody will still even be seen with me after making such an outrageous claim.

I only kept adding nutes because the plants were so lime coming out of pre-veg. Then the leaves starting yellowing/browning and fell off quickly. I started bumping nutes at 200 ppms at a time and waiting a couple of days before adding more. I was slowly seeing new growth green up. A few times I added 700 ppms at each bump.

I put more than $120 worth of Canna in this last 30 gal batch!

I'm using R/O water with a 120 ppm base & CalMag @8ml gal, drip clean, and Botanicare Silica Blast.

I'll post some pics.

 

[brightskies]

I have them on 2 separate reservoirs.

 

[deepcover]

you need to take a step back and look at how you are approaching growing


you dont need a TDS pen to grow well but of course it helps alot. 7900 ppm is retarded. in veg im @ 900 ppm tops . if you just follow bottle recommendations by 3/4 you will do well without ever measuring PPMs. something u are doing is killing your plants. plants grow fine by themselves. remember that. there is something YOU are doing to fuck em up

 

[brightskies]

I'm just trying to learn. Can you please be more specific?

 

[deepcover]

I'm just trying to learn. Can you please be more specific?

If you empty out that $120 res you just mixed and mix in your base nutes to 600-900ppm (strain, room, etc. dependent) and pH it it to 5.8-6.3 (or whatever is appropriate for your medium), and your temps are good and your humidity is good, and all your equipment (pumps air stones timers) are working correctly, and you dont have a bug infestation, your plants will grow.

What are you doing to fuck it up?

 

[deepcover]

I'm just trying to learn. Can you please be more specific?

If you empty out that $120 res you just mixed and mix in your base nutes to 600-900ppm (strain, room, etc. dependent) and pH it it to 5.8-6.3 (or whatever is appropriate for your medium), and your temps are good and your humidity is good, and all your equipment (pumps air stones timers) are working correctly, and you dont have a bug infestation, your plants will grow.

What are you doing to fuck it up?

Get rid of everything for now except for the calmag and the base nutes. use silica as a ph up if you have it. empty that res out. calibrate your PPM pen. Mix in 600-900 ppm of your nutes including calmag and silica. let the room run for a week and make sure your temps and rh are in line as best as you can. everything will sort itself out unless your plants are too far gone which they dont look like. But i guarantee they will be killed @ 7900 ppm.

 

[deepcover]

btw your temps are too high relative to your RH. With 85-90f temps your RH should be at least 70%. I run a room @ 90f and it needs to be at 75-80% RH in veg to keep the plants happy. You need to get temps down if you can't get humidity up.

 

[brightskies]

If you empty out that $120 res you just mixed and mix in your base nutes to 600-900ppm (strain, room, etc. dependent) and pH it it to 5.8-6.3 (or whatever is appropriate for your medium), and your temps are good and your humidity is good, and all your equipment (pumps air stones timers) are working correctly, and you dont have a bug infestation, your plants will grow.

What are you doing to fuck it up?

Get rid of everything for now except for the calmag and the base nutes. use silica as a ph up if you have it. empty that res out. calibrate your PPM pen. Mix in 600-900 ppm of your nutes including calmag and silica. let the room run for a week and make sure your temps and rh are in line as best as you can. everything will sort itself out unless your plants are too far gone which they dont look like. But i guarantee they will be killed @ 7900 ppm.

Thank you, I really appreciate the help. I've had some decent grows before. I was doing fine until I got the CO2 system and started off by trying to use it in veg.

I'm afraid to come off the nutes, the plants are just now finally starting to look half-way decent. I feel like an addict!

I know what you are saying makes sense, I have done it before.

The last crop was looking underfed from the beginning also, so I gradually increased their nutes from about 1050 to 1450 and they didn't get any better. I flushed them, put them back at 950 ppm, and watched them die off over a few weeks time.

Same thing happened this round, except I kept feeding past 1450 ppm this time and the plants improved the more I fed them.

Maybe the aliens have replaced the atmosphere in my garden!

In all seriousness, I'm pretty stressed about it.

 

[Bob-Hope]

Dont take this the wrong way Brightskies but imo i think youve had a bit of a stoner moment,

it sounds to me that youve got the decimal point in the wrong place, your actually feeding your plants an E.C value of 1.58 which according to hannas conversion chart of 0.5 is around 791 ppm.

move the decimal point over and you get an E.C value of 15.8 and a ppm 7900
does this sound right to you or am i more baked than i think.

BoB

 

[brightskies]

Stoner moment yes, decimal point no. I'm definitely at 7900, not 790. I've been calibrating weekly to a new bottle of 1382 ppm test solution.



But that would be the first thing I would point out to a fellow stoner in my situation.

 

[Bob-Hope]

Brightskies ive just mixed a canna aqua vege solution up in the garage and to get a E.C of 15.8 i had to add 286 ml of A+B per ltr of water.

Plus your 8ml of CM per Gallon or nearly 2ml a ltr.

So my question to you is how much A+B per 1 ltr of water are you adding.

 

[Bob-Hope]

According to cannas feed chart to get an E.C of 15.8 you would have to add.

3.5 litres of canna aqua vega A+B to your 125 litre ressy, if thats what youve added then your meters are correct.

BoB

 

[Marshall]

most of my meters wont read over 2000, they just show a -.

What about PH? Are you measuring and adjusting PH? I am wondering if your PH is so far off, that you have to dump in a ton of nutes to get the plants what they need.


I have had plants hit the 2000 mark when I left the res unattended for extended periods and honestly they looked fine, no burn. But since the PPM's went up, I shoot for a lower PPM when mixing nutes.


7900 just seems so high from everything I have read. Of course I have no hands on experience with PPM's this high


I also wonder if you just had a deficiency and if adding a supplement would have been enough

 

[Rowdy420]

LOL, decimal point. Attention to details friend

Good luck, peace

 

[Andyo]

Ph run off from clay balls 1hr after flood?

Ph run off from clay balls 1hr after flood?

ive been flood n drain in hydroton nearly 20 yrs .
Your ph in pot is rarley what is in your res.
check last drips off run off from your pot 1 hr after flood n drain .
I all ways calculate ppm from EC figure by dividing by 1.4 .
I veg up to ec 2.0 ph 5.5 and flower at 1.85 ph 5.5 first 14 days then drop new tank to 1.6 ec ,ph @ 5.5.A

 

[brightskies]

I mixed in about 5 liters of A & B into the 30 gal of water this last rez change. I'm confident the EC is correct.

Initially I thought the increased nutes were required by the addition of CO2 to the room. After a certain point, I just kept going out of curiosity because the plants kept improving.

After 3000 ppms I was really scratching my head but I kept going.

I think you're right Marshall, they were probably deficient in something in the beginning.

I've only been over 7000 ppm for a week, but I've been over 4000 for 2+ weeks now. I'm surprised they haven't died yet.

I flushed them yesterday and will put them back on a regular diet and see what happens.