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The question is... what can digging around and "checking" on the seed actually do to help it germinate? Well nothing :( So don't fuck with the seeds! You know the environment is right because the other one popped. So it's just a question of waiting. It can take 2 weeks. Until then try to have...

You get voltage drop with long cable runs. We are talking a run of 100ft of 14AWG for a 5% drop. You can work out the volt drop yourself: http://www.rapidtables.com/calc/wire/voltage-drop-calculator.htm Larger cables give you less drop.

http://www.smscom.eu/epages/78178256.mobile/en_GB/?ObjectPath=/Shops/78178256/Products/22-1000 Kinda like that? Set your min and max fan speeds and. It'll keep your room at a defined temp. It's Variac based so no hum. You don't usually want to be turning fans off completely as that'll cause...

3 things to be aware of: 1: Ozone oxidises manganese, iron and sulphur making them insoluble and unavailable to your plants. Therefore you might end up with deficiencies. 2. Ozone oxidises all bugs in the solution. It will sterilise everything including any beneficial bacteria present. 3. Since...

Chill. Your space is plenty :) Once you have it all dialed in I'm sure you'll be very happy with it :) You're already doing very well :)

"FLIR one for iPhone 5" can be had for about £110 on ebay. Plug it into an iPhone 5 and you have a FLIR camera! Works very well and can be used to check canopy temps, light temps, locations of pipes in walls etc too. You can get an android version and a iPhone 6/iPad version but they're about...

Yes it can. HID lights need a high current to spark up. Once lit the current stabilises. You need the controller for HID lights to allow for this high current at start up. LED lights don't have the same high current on start up so a controller is not needed (in fact LEDs typically use less...

That's right... but if a dedicated circuit is going in anyway then better have it capable of running 4000w all at once IMO. There will inevitably be times when both areas light up at the same time by mistake or timer error etc (unless the areas are wired up via a control relay to make that...

If you're going to be running a load for more than 3 hours you can only run at 80% of the circuit rating. So you need 6500w for lighting alone. Then depending on what you're planning and your climate you need to add water pumps? Fans? Air pumps? AC? Chillers? Who knows? You haven't said what...

Room intake is from the old bathroom extractor vent in the roof so I get fresh air coming in. Room extractor is into the bathroom (old bathroom extractor vent). So all the heat goes into the house and there is no heat signature visible from outside. I have a FLIR camera and have checked it out...

Bit of fiddling today. Put a 12 inch desk fan in a corner of the veg tent. It's slightly too strong on setting 1 so I've had to jiggle the plants around a bit. As most of the seedlings are 8 days old I've upped the PPM from 350 to 500. Eventually balanced the pH at 5.8... I get a bit flumoxed...

You have a 5.4 square feet footprint with only a 4 foot height. 600w would be 111.11w/square foot 400w would be 74w/square foot 250w would be 46w/square foot It is generally recommended to aim for 50-80w per square foot of HPS lighting. So... I don't get why people are recommending a 600w?! He...

I went and pulled out my wide angle lens to get a shot of the current LED height. I now have 720W (10x 100W COBs running about 70W each) of cheap COB LEDs in there and could get them about 5ft off the floor. The veg room is about 6ft from floor to ceiling but is in an awkward shape: The...

So it's been a week (7 days exactly) since the first seed germinated and 5 days since I moved the seedlings into the mini 5L RDWC veg room setup. I can never quite get an idea of what to expect in terms of growth. Some people post monster pics of "1 week old" seedlings that look almost...

Don't flush them. Don't move them - they're too big and smelly for you to handle properly. Considering you're in the middle of a block of flats you could easily get spotted. You're young and seem prone to panicking... not a sensible plan IMO. Chop them 2 days before the inspection. Get the...

How about posting some details of your grow? That might get some meaningful input. At the moment your post basically reads "OMG, PANIC EVERYONE!!!! I'M SCREWED IN 10 DAYS" and not much else. Like... how many plants? what medium? how big are they? what condition is the room in? have you messed...

I don't quite get how you're using rockwool and an aero cloner together? Do you have rockwool in netpots? Are you using any clay balls too? What made you want to put seedlings in the cloner? (Not criticising... I had seedlings in a cloner myself while I got the rest of my grow room together but...

Sorry mate. You're talking nonsense. It's not been beaten to death anywhere. If you use a part within its rated specs then you should be fine. For *this application* the relay I linked is perfectly fine (the contactor you linked would be fine too). I don't really get why you're trying so hard to...

Today I built the frame for the water cooled lights radiator. Essentially we have a radiator from a 2.0L petrol car which should be capable of dissipating around 57,000W of heat. I'll only be asking it to handle around 1,400W of heat energy at a time so it should be more than up to the task...

As someone who has a little experience building DIY LEDs I would say they don't sound right for you... also don't be tricked into believing they're a LOT cooler than HIDs... they are still very hot if they're packed together although somewhat less hot than a HID. A HPS light is typically around...