THCBrain
Well-Known Member
I have only used mine horizontally, but did find I had to add a 600 towards the end, in your case I'd have the 315 at the bottom and the 600 on top.
My First Vert
- Thread starter JDMase
- Start date
I think I'll switch them round, and then put the 600w on at around week 7 at the top of the tent then. That ought to save me some money. I think they prefer the CMH spectrum anyway.
Same boat man! And as soon as I get the money I'll probably go LED anyway.
gr865
Well-Known Member
Why?
Quantum and cobs run cooler and with 1 CMH im still getting temps of 30c+ albeit Its a lot better since I got a new extraction fan.
gr865
Well-Known Member
In my experience, using the SS400, the led's themselves do put out that much heat but as a unit the exhaust for the heat sinks is where all the heat comes from. I had a hard time keeping my cabinet grow cool using the led.
Both of my ballast for the 315's are mounted outside the tent. Just using passive cooling from the house keeps my tent around 75 to 78 degrees and humidity is 51%.
Not sure what the temps will be when I add the second 315 but running vert with cooling fan below the lights it should not be a problem.
HGO, in ICmag, did a stacked 600 HID in a 4x4 and had no heat issues. I have been told my stacked 315 should be the equivalent of 500W HID's for each lamp.
GR
Kings kush looking really unhappy. Trimmed the gro dan White plastic away and potted into an air pot (yellow base) with lots of rockwool croutons, thoroughly watered and hoping that it perks up by tomorrow. It's looking awful today. Black dog isn't as bad, but definitely will need potting up, will do that tomorrow as the Kings kush trellis was a dog to move.
Got two new tents and have moved the others into their new homes. Clones also not looking too great. Not having a good time this round. Pictures to follow tomorrow!
Got two new tents and have moved the others into their new homes. Clones also not looking too great. Not having a good time this round. Pictures to follow tomorrow!
Clones not doing too well, I can only put this down to not sterilising my utensils properly, a few have died and the stems just seem to go brown and shrivveled, they seemed to shrivel a lot when I took the dome off. Next time I'll take bigger clones and probably not trim the leaves as much. I think most guides assume your taking 20+ clones. I added half a cup of water half way through (opposed to the 2 cups recommended) and the Rockwool cubes were warm and drenched.
Feeding just water with hydroguard at the moment. They have xtreme mykos and azos on them right now
Feeding just water with hydroguard at the moment. They have xtreme mykos and azos on them right now
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Kings kush looking sad since I put it on the trellis. Upgraded the root space and switched to a 12/12 as I just want to flower it out asap.
Leaves are curling under and drying out. New growth seems to be ok but still heavily curling.
I don't know what to do with it.
Leaves are curling under and drying out. New growth seems to be ok but still heavily curling.
I don't know what to do with it.
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HSO black dog looking slightly happier than the KK, dark leaves lead me to think nitrogen tox? I don't know, im trying to not overthink this one. New growth seems good, both the Kings kush and this one have grown despite looking so poor, throughout. That's about a month of growth with issues. Wish my clones would take because it's a keeper for vigour.
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GOT ROOTS?!
I love seeing lots of roots, because that means lots of fruits!
This Grapefruit has plenty of roots, I need to figure out a way to raise the cubes off the tray, but can also support the weight of the plant. I need some type of grill. Im gonna give the trellis I used a go but I feel it won't take the weight.
I watched an interesting video about air pruning and the "4 inch rule" anyone else heard of it?
I love seeing lots of roots, because that means lots of fruits!
This Grapefruit has plenty of roots, I need to figure out a way to raise the cubes off the tray, but can also support the weight of the plant. I need some type of grill. Im gonna give the trellis I used a go but I feel it won't take the weight.
I watched an interesting video about air pruning and the "4 inch rule" anyone else heard of it?
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coreywebster
Well-Known Member
Alright chief, Did you get your temps sorted in there? If not that can add to N tox somewhat.
How are you finding the cmh In your veg tent? I'm loving mine so far, Sure beats the 400w hps in every way. Rightfully so like!
I have heard of air pruning, I use cloth pots now. What's the 4 inch rule?
coreywebster
Well-Known Member
Yeah they look a bit small mate. I have had very small ones before but maybe not that small.
If you still end up with no luck next time just ditch the rockwool and use that seed tray with perlite in every other cell. Put an inch of water in the bottom or propagator and leave em be. I don't use a dome or mist or anything else. 95%-100% success rate.
Rockwool stays wet for a long time and isn't the best for oxygenation, its a good combo for brown stems.
coreywebster
Well-Known Member
Depends on the LED in question. There's no point unless they are efficient. A lot of folks think LED is cooler because they cant feel the heat but its just getting dispersed into the grow room quicker, I'm talking cheap LED there.
Those cmh stacked will do amazing I imagine.
I gave my mate my old cool tubes with 600w hps, he runs 2 stacked in the cooltubes in a 1mx1m tent. No problem with temps. But obviously his extraction is set up to go out of the house entirely, not getting churned back through over and over.
Anyway point is he does damn well with them and makes the most use of his space since he had to down grade after moving house.
Will have to keep an eye on your posts, real interested to see a stacked 315 cmh on the go.
Hey mate, yeah the 1metre tent was vegging everything for a while, I can't fault the CMH, when I switched from it to HPS I got so many issues. Maybe due to heat, didn't know heat could add to N tox.
Temps are comfortably under 28 with the CMH floating in the middle with a fan underneath blowing up to the extraction. Plants look happier. I have everything not in the 1m tent in a 60x60cm tent under a 125w CFL now, they are doing better in there than under the CMH, makes me think that ive been hitting my plants with too much light for too long. They've doubled in height in a week nearly hitting the roof, this could be due to the fact that they're close together, apparently they know they have no space when they touch leaves so they grow upwards instead - not an issue as I have 2 metres to play with once in flower.
The 4" rule is basically that you should only let the tap root grow 4" until it air prunes, and sends back that signal to grow more roots outward, apparently 4 inches is all you need! I can't complain about that. Saw a comparison of plants that had more or less root length and 4" seemed to be the magic number. You should do this with every seed as it was shown that any other configuration of pot or method encourages rootballing and harmed growth even into later life.
Ive put a cutting into a glass of water covered in tinfoil to block light. No dome maybe the occasional mist? Will see how it gets on.
I split a couple rockwool cubes open and the third one had tiny little nubs forming but the rest of the plant looked dead. I am hoping I just drenched them too much and that they'll pull through. I only need one of each.
Im doubting that I'll stack two until September, I need a decent yield from the KK and BD to be able to afford it. I expect using one to just mean I'll get more larf on the bottom branches - no different to what a normal scrog would achieve. I still think this way of growing is more efficient and optimal for the space. Nobody ive spoken to off this site has agreed. Will wait and see what the yields say.