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Found 30 results

  1. First post guys go easy on me. Been following for years just never signed up. Now I have a conundrum and after some thoughts. I have as much airflow as I can arrange so adjusting this is currently not an option. which of the following is likely to yield more - 3 x 600w and 1 x 400w hps light and a canopy temp of 32 degrees c during lights on (with good circulation) (also temp below canopy and at pots is around 26) - 3 x 600w Hps only and a canopy temp of 27 degrees c during lights on all 4 looking healthy and fine I just can’t decide if i should drop 400w and have ideal temperatures or use the extra 400w and have canopies above ideal temps. discuss...
  2. roots

    Greetings fellow growers. My question is this, Do you monitor root zone temperatures if so what temperatures do you aim for and how do you achieve this without overheating the grow space or the foliage? I am growing in Allmix under a 275w LED full spectrum in an 80x80x2m Black orchid. My plants are 18 days old. Photoperiods, Green Gelato from RQS. The light is at about 80cm giving about 250 PPFD which generates enough heat for the canopy with a small boost from a 80w tube heater. The plants are in one litre fabric pots positioned on a heat mat for seedlings and young plants. I am trying to heat the root zone to about 22c by having them on the heat mat but this generates a lot of heat which rises up under the leaves reaching about 30c in places. I have tried various different methods of placing the pots on the mat. i now have them raised on up turned pots to lift the plants above the seed mat but still heat the base of the plants and hopefully the roots. This works but takes about an hour to reach 22c when the heat mat kicks off and the soil has reached the desired temperature. Will this heat damage the plants? I am watching them carefully and one plant seems to be suffering from droop. Possibly too much water but I am weighing the pots before watering to ensure not excessive but i might be wrong. They are still small in relatively large pots so One of them might have had too much. I try to grow them all exactly the same, to try and keep them even heights. The first grow I had three plants which all finished at different heights so had to raise two of them up by about 10 inches. . So is there another method for heating the roots without excessively heating the immediate space that the plants are in. I had thought perhaps building a sand pit with warming cables to put the pots on but this would be the same as a seed mat, or would it? Any suggestions or experience based opinions welcome. I have been scratching my head with this one. There must be a simple solution. Although I read an article by a horticulturist in which this seemingly simple goal is not so easy. How can the root zone be properly heated without heating the rest of the plant. The article suggests for plants outdoors it is fairly easier for the plant to establish a median temperature in the soil outdoors but in a grow space where the plants are in pots it is the fluctuations in temperature in the root zone which is bad for the health of the plant. Ant thoughts please.
  3. Hi all just wondering, what are safe night time temperatures outdoors, if the plants are still young and in 11l pots, in the UK. what temperatures should you consider bring them inside, and what temperatures are ok to leave them outside. I live close to Cambridge in a town, warmer than coastal areas. Many thanks
  4. Hi Guys! I hope that I can get some help in my first grow. I bought my grow setup with following inside: - 1.2x1.2x2m tent - Carbon filter fan kit 4'' - 4 breathable 16L root nurse pots - 600w Lumii Black Light kit - Canna coco natural - Canna a+b I have already planted 4 seeds, 2x white widow, 1x amnesia haze, 1x Skunk XL and they are already seedlings about 3cm long. I ordered few more things which I am waiting for ph meter, digital thermometer, 2x 6'' fans for air circulation. The most important thing that I worry about is temperature, I am still waiting for thermometer to check it but while light is running is literally really hot in the grow tent so I think is too hot and 4'' fan that is connected to carbon filter is not really doing the job. Do you think that 2x 6'' normal fans will help ? At the moment my budget is really low so cannot buy some big expensive fans. In around 2 days I will try to update you guys with exact temperature. I hope you can guys help me. Looking forward to your replies !
  5. For those using fittings from the excellent @diyleduk - what temps do you run at? My mind tells me that 25-30 for veg and 20-25 for flower should still ring true, because - light is light? But I've read a few posts about running higher with LEDs but I'm unsure whether these claims have any merit to them.
  6. Planning on running intake&exhaust looking for a twin fan controller to help me control temps. Can anyone make a suggestion? & if you can remember the price paid it would be helpful since I'm trying to compare price. Thanks in advance:) & HAPPY NEW YEAR!
  7. Please move if posted in wrong place Hi everyone. Been reading on here for a while found a lot of helpful information that’s helped me with my first few attempts. Long story short I started growing to help my mum who had terminal cancer with pain relief, fast forward 18 months and I’m now on my 4th grow. I’m struggling to achieve gpw and think this is down to my environment. I have a 1.2m bloomroom loft tent. I have a 6 inch outtake with a rhino filter. Currently using passive intake with a bit of ducting from room below. Running a 600w hps with dimmable omega ballast. X2 oscillating fans, humidifier for veg. 700w oil filled rad for lights off. My fan is a rhino thermostatic but I don’t think the temp control is very reliable. I’ve been using 11l pots with pure canna coco. Using canna range a and b, rhiz, cannazym, boost and pk. Swapped pk for bloombastic on current grow as advised by someone better than me lol. Watering every 2 days up to 2.5L in flower! Don’t seem to be getting the growth I would like in veg and seems to take forever for them to gain size! Now for the questions please! Do I need an intake fan? If so what size? Recommendations on fan controllers for intake outake and heater? Or easiest way to control them all? Would I be better doing 9x6.5l? Less veg time? If so would I put them straight under hps from cutting? A lot more info to share with you guys if you need any to help me! Sorry to ask so many questions on my first post! Thanks in advance
  8. Easy people, Still struggling away in an attempt to achieve the holy grail... The perfect environment! Moved my tent into a different room for my latest grow. It's now in a cooler room which is on the detached side of the house so come summer I can fire up the fan a bit more and not worry about the neighbors! I've got a 1.2 tent with a 315 cmh and a 600w hps (which I run between 600-400w depending on the weather) and am managing to maintain a nice 25-28c canopy temp. When the plants were vegging floor level temps were sweet, but as I've put a net in the canopies developed and now I'm struggling with the floor temps being too cold. Between 15-19c at lights on If I have the oil rads on surely the heat will just rise and so will canopy temps? Am I going to have to some heat mats? How do you guys have your tents set up?
  9. Hi there, Anyone know anything about aeration of roots in a coco mix? Any particular times that are best, night time vs day time, once a week vs few hours a day... I am wondering if theres too much air being pumped as I can't imagine it being too good if that causes heat build up in the plant medium. What is the optimal temperature for the coco medium? I put a temperature probe in and the pot is currently 24°C. Is the medium too warm?
  10. Hi buds. I'm posting this here as well as on my diary. I've already started with the 18/6 lighting cause the sprouts popped out and added the nutrients. However, I'm having a hard time setting the environment. My main problems are: 1. The 400w HPS bulb is hanging few inches from the top of the tent and I'm still getting a minimum of 28.8 C (in the picture I'd just switched the light on). Too hot :/ 2. RH has gone from 60-70%, which I considered ideal, to 40% with the lights on. Not looking good. 3. Water temperature is also a problem, even with bottles filled with ice the minimum I get is 21 degrees, and just for a couple hours. 4. I removed the air pump because of the noise and ordered a new one that's supposed to arrive on Monday. Not that it worries me too much because roots didn't reach water yet. All in all, I don't expect much from my first grow, as I understand hydroponics requires more experience and I'm a complete newbie. However, I would like to get tips from experienced growers and learn from my mistakes. Cheers buds!
  11. Hullo, First timer here, 1.2x1.2x2m Mars tent with 600w Solis-Tek digi ballast, 6" exhaust, pulling through a f^k off carbon filter. Hand watered coco with Canna nutes. At the moment I'm just getting my bearings and while my Type K thermocouple thingamy has been invaluable during the hot weather (barely managing to keep below 30c during hottest part of day, but the girls are seeming to love it =) ). However I'm thinking I might need to get a handle on the moisture levels in the air as they really start to party hard. So would appreciate a product that will allow me to put sensors where they will do most good, and more importantly allow me to take readings without having to wake them up (ie have the display outside). Not above building some sort of home brew "fabracobbled", GitHub sourced thing, but prob more sensible to start with a working unit that will give me a baseline to be able to move forward from. Don't want IoT stuff, no RGB, simply something that works, every time, without alarms or "features" that won't get used, think Nokia rather than iPhone =) Finally I would like something that will manage to survive at least a couple of seasons, but not having me have to sell the kids. So if you have come across such a thing, please point me in the right direction. Cheers, PS Also I wondered if there was any benefits to other things to bring the moisture down rather than a full on de-humidifier ? (N.B. NOT affiliate links) Bags of magic stuff that pull in moisture (along the same lines, Or if it gets really bad, bite the bullet and get.. Big thanks in advance B
  12. Oioi I need some advice on keep temp low in tent and humidity high with out spending loads. I've got five dark devil auto on the go but temps are exceeding over 30 degrees and humidity drops when I turn extracter fan on. Any help would be appreciated
  13. I've just opened my tent to find condensation all over the lower part of it while my humidity meter reads 39%. My temperature is 25.5c while my fan seems to be running at low speed, which is set at 30%. Is my problem that my low speed set point is too low for the transpiration level of the plants while the correct temperature is being maintain so easily by the fan? Does that make sense to anyone else? Ta Fax
  14. Hi everyone just after some opinions and an answer to some questions. First of all what is the ideal temps and humidity when flowering starts? I read somewhere but cant remember where, do the plants take up some of the temp and bring it down? Im struggling to get my tent down below 25 degrees currently started week 2 of veg. Should I transplant into a bigger pot once I go into flowering? I have fabric pots what do you guys think of them? Thanks in advance.
  15. Just wondering how everyone is getting on in this mad heat. I generally only do 1 or 2 grows a year and they always (by pure luck) seem to fall mainly over the cooler months. Just wondering what everyone's set ups are, and what their temps are running at now? Feeling quite lucky that my 1000w in a 4 x 4 finished a month ago! Especially the loft growers! How the hell are your plants still alive
  16. Hi, using 400w hps in a 1.2 x 1.2 x 2m tent. It was 36C in there lihts on and 28C off. I changed my intake fan to be a 2nd extractor, improvised a passive intake, bought an air cooling unit and put it in but I still can't get it below 33C lights on and my plants apear to have stopped growing Any advice will be welcome. I'm running a 4inch Can Fan extraction unit to an open window and I've moved my hot ballast out of the room. Am running out of ideas
  17. Hello guys, I have a question about air-conditioning and before I start I completely understand how AC works. You have an unstable gas which draws heat from a space when it evaporates in a cooling coil then kicks out the heat when it condenses outside - typically on a roof top. My question is that with the smaller units which are fully self contained, non- commercial and have a foul air heat duct, will the air that they expel be stinking of weed and could I possibly add an inline carbon filter and supplementary fan to scrub the air?
  18. Just came across this on Kickstarter, looks like it could be a very useful grow room tool. https://www.kickstarter.com/projects/1309712609/thermoco-coin-size-smart-thermometer-and-recorder?ref=category
  19. Hi all, is 17 degrees far too low for lights off in coco grow, hand watering? Also, how do you check the lights off temp without disturbing the dark cycle?
  20. I have a DP90 propagation tent with a 4 tube T5 Lightwave unit. im concerned that the temperature for the just sprouted seeds is too high, the t5's are about 6" above the seedlings and im seeing temperatures of 30-33 deg c. is this temp ok? or should i raise the T5's up another 6" or so.?
  21. now then every1 wondering if i can pick some brains. been doing a lot of reading over the past couple of month and came across an article about temperature. this article basically says in the first 2 weeks of flowering to keep the temp the same through day and night. by doing this it concentrates growth energy into the buds rather than the internodal (which i assume is the stalk). this is the article any info would be helpful cheers
  22. Hello uk420. I am seriously considering purchasing the sun system xxxl 6'' inch dominator reflector. Any one currently using one? Does any one have experience with this make reflector or ones similiar? Also will the lead supplied fit into the 3 pronged connector looks like a kettle type on the sunmaster fx digital ballast ok?
  23. Hi, just wondering what the temperature should be (max) whilst flowering? Currently I'm running between 20c lights off/ 29-33c lights on! Does the flowering process cease above a certain temp? I know for bottom end its about 14c Any help be mucho appreciated
  24. AtticStairs

    From the album Loft_Grow