5x5 LED - T-Time grow time
- Thread starter T-Time
- Start date
Prawn Connery
Well-Known Member
That system's rocking, mate. Looks like you're getting everything dialled in really well. I do hope the run-to-waste conversion was worth it - it certainly looks like it!
Prawn Connery
Well-Known Member
I don't see why not. Due to coco's propensity to cation exchange (hold on to) calcium and magnesium, a bit of extra CalMag works well. And, from what I've seen, LEDs seem to have a slighty higher demand for calcium and magnesium, too. I've started using CalMag for the first time in many years, and only since I switched to LEDs.Yikes, they're naked! Pure pot porn.Great thread T-Time.
Good point.
It's why the local hydro store thinks 300 ppm well water could be an issue. What do you think, safe to try in a Hempy bucket with 30% coco?
DownUnderDoper
Well-Known Member
Holy shit! They've laughed it off.
ttystikk
Well-Known Member
So cruel, so cruel... LolDay two after defoliation.
Flipping to flower (11.30/12.30) today. Fingers crossed they gonna double the size this time
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nfhiggs
Well-Known Member
Nice light, but a bit overkill for the space, IMO. I would have done it with 12 strips and a single HLG-480h-48A.Lights that I've finished building for my friend today.
16x samsung f-series on 2x 320h-48a.
700W for 2.5x5' grow space.
Now that got me thinking...
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wietefras
Well-Known Member
Randomblame
Well-Known Member
I also like to build mine with soft driven strips/COB's, so one can use it later on the doubled surface with a bigger driver.
But I usually sell mine after max. a year and the doubled area is a good selling point.
But I usually sell mine after max. a year and the doubled area is a good selling point.
SSGrower
Well-Known Member
So there's a market for used DIY LEDs?
That would make upgrading much more appealing if I could sell my 12xcxb3590 rig and hlg320 for what I got in them.
nfhiggs
Well-Known Member
Its not realistic to expect to get back "what you got in them", but you can certainly recoup a good portion of it.
Randomblame
Well-Known Member
I see lots of used lights on e3ay.
I have a friend who owns a hydro store and whenever I have one to sell, I'll let him know. Usually I only use them for a short time. I just like to build new ones, it's like an addiction.
Untill today most of my lights are sold to my friends and I've made a few directly for them.
Prawn Connery
Well-Known Member
I've got the equivalent of 8 of those hooked to 2x 240H-48 drivers in a 2x4 and I learned the hard way not to max them out!Lights that I've finished building for my friend today.
16x samsung f-series on 2x 320h-48a.
700W for 2.5x5' grow space.
Now that got me thinking...
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But like you said, you can always underdrive them. I'm running at about 400w at the moment and that seems about right.
T-Time
Well-Known Member
Thanks for all the info guys. I definitely pass the info.
Day 6 after defoliation.
Plants are begging yet again for more food being a bit pale so bumped EC 2.26 >> 2.56. Will see how they going to react.
Light set up @600w
Temps 27-28*C
RH 48%
Basically this run I decided to feed them 4x~200mm of nutes instead of 5x~200mm like I did last run as they were a bit over watered last time. Will see how thirsty they will get later on and adjust as I go.
I'll try to get some time and do new fan fixture in couple of days that will blow air directly down, not towards the back wall and reflect down like it is now.
Day 6 after defoliation.
Plants are begging yet again for more food being a bit pale so bumped EC 2.26 >> 2.56. Will see how they going to react.
Light set up @600w
Temps 27-28*C
RH 48%
Basically this run I decided to feed them 4x~200mm of nutes instead of 5x~200mm like I did last run as they were a bit over watered last time. Will see how thirsty they will get later on and adjust as I go.
I'll try to get some time and do new fan fixture in couple of days that will blow air directly down, not towards the back wall and reflect down like it is now.
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ttystikk
Well-Known Member
Unless your RH is quite high I would suggest you reduce your EC rather than raising it. This may seem counterintuitive but a salty solution can be harder to draw up through the roots due to high osmotic pressure.
Prawn Connery
Well-Known Member
I might have to agree to disagree on that. Coco is a good buffer because it has a high cation exchange capacity - unlike rockwool or perlite or hydroton or other types of reduced media water culture - so binds cations that would otherwise build up in solution and start the process of reverse osmosis, where the concentration of nutrient in solution exceeds that of inside the plant, and starts to draw water from the roots in the opposite direction to which it normally passes to balance the equation on both sides.
All the issues I've had so far growing in coco under LEDs have been related to underfeeding, rather than over-feeding. Either the LED light, being a much fuller (complete) spectrum than HIDs, is driving photosynthesis more efficiently, or I've simply been underestimating how bright they are for their power consumption.
Your plants don't look like they need less nutrient to me, but that's just my opinion, and I have quite a few years experience growing in coco.
Now, you can try underfeeding them - and if it works, fair play - but you could also try increasing the concentration or, as you have suggested, cut down on the number of waterings each day to allow nutrient concentrations at the root zone to build more due to evaporation and reduced flushing. By slowly increasing the concentration, you'll soon know if that's what the plants need and the worse that can happen is you start to burn a tip or two - in which case you simply flush and start again.
I'm not writing this to be argumentative - it's what I honestly believe.
All the issues I've had so far growing in coco under LEDs have been related to underfeeding, rather than over-feeding. Either the LED light, being a much fuller (complete) spectrum than HIDs, is driving photosynthesis more efficiently, or I've simply been underestimating how bright they are for their power consumption.
Your plants don't look like they need less nutrient to me, but that's just my opinion, and I have quite a few years experience growing in coco.
Now, you can try underfeeding them - and if it works, fair play - but you could also try increasing the concentration or, as you have suggested, cut down on the number of waterings each day to allow nutrient concentrations at the root zone to build more due to evaporation and reduced flushing. By slowly increasing the concentration, you'll soon know if that's what the plants need and the worse that can happen is you start to burn a tip or two - in which case you simply flush and start again.
I'm not writing this to be argumentative - it's what I honestly believe.