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Depends what your ambient air temp is like? If outside is cooler than your room then opening the skylight will make it cooler (hot air rises and will escape through the skylight). If outside of hotter than your room then opening the skylight will probably heat up the room to about the same as...

I've just switched to 12/12 today. Pretty certain they've all rooted well. The idea of RDWC was great but it wasn't meant to be this time.

Hi mate, They're 8.5L each. Here's a pic with a 10L nute bottle plus a 1L jug for scale:

Update! So it's been about 12 days since I moved all the plants out of RDWC and into hempies. I've had everything in the same 8x4 tent under 1200w of COBs. Not turned up the lights to max because I was trying to give them a chance to root. Another 2 days and I'll switch to 12/12. Here's what...

This is a common misconception (and I understand why). If the return line was purely gravity fed then pipe diameter would make a difference. But as you'll be using a pump to control this flow it is independent of pipe diameter (unless you're restricting things with a tiny, tiny pipe). To...

Electronic patient records have been implemented since... about... 2004 in the UK. It would be almost impossible to find a hospital in the UK which hasn't got EPR in some form (it's upto each individual hospital to choose what exactly they want to implement). Some hospitals have been through 2...

Man don't care.

Water block is 120x40mm Aluminium Water Block from Smart-Bes on alibaba. https://www.alibaba.com/product-detail/Smart-Bes-40-120-12mm-Aluminum_60221287206.html?spm=a2700.7724838.0.0.uJTlm8 They do various sizes and configurations. I used 40x40mm blocks on my initial lights. Epoxied them onto...

Thermal glue. Doesn't quite have the same heat transfer properties as thermal paste but it's good enough. Big advantage is no drilling, no screws, no kapton tape, cheaper than anything else (a 0.99 tube on ebay will be enough for around 40 COBs). Leave it to dry for 24 hours and it's pretty...

Yeah it's fine. I used a very similar Eheim pump (1048 I think) when I first got into computer water cooling around 2000-2001 and ran it for around 2 years 24/7 with 1/4 antifreeze in the loop. There were no specialist computer water pumps or coolants back then.

Yeah, the system is filled with RO water and I've added an antimicrobial additive. Also made sure the radiator is aluminium to match the water blocks. Mixing copper with aluminium would have been a disaster.

Thought I'd share my water cooled COB build here. I've built 8 light bars with cheapo chinese COBs. The idea being to initially build them cheaply and then swap chips to something more efficient after a couple of grows. As this is a bit of an experiment I didn't want to spend thousands and...

Agree if you're putting cannabis in your drink to make you sleepy then coffee probably isn't the right choice of drink :lol:

I drink coffee before bed :) I can sleep anywhere, any time no problems. In my car, on a kitchen table, through a couple of hurricanes! Coffee has no chance against my sleeping powahz.

I agree some discretion is advised. There is a good reason my profile here is completely separate to any other online activity. This goes even more for a cannabis forum than other clearnet sites. By buying on the darknet you need to send a drug dealer your (or possibly someone else's close to...

Heavy wire cutters.

So I've been a busy bee over the past couple days. I washed 300L of perlite and 100L of vermiculte. What a pain in the ass! :o Have filled up 14x 20L hempy buckets with a perlite base upto the drainage hole and then perlite/vermiculite in a 3:1 ratio. This is exactly Hempy's original...

1. You need some bitcoin. You can use Circle, Coinbase or Localbitcoins to buy BTC. I use localbitcoins. 2. You need a wallet to keep the bitcoin in. I'd recommend Electrum for a first try. 3. Buy the bitcoin from your chosen market and have it sent to your wallet address (you'll be able to...

Hi mate, They are flexi trays: http://www.growell.co.uk/deep-flexi-trays.html You can also get "Garland" trays which are plastic and not flexible: http://www.grotechonline.co.uk/hydroponics.asp?page=garland The flexi trays have the advantage of folding up so they'd fit through a tight loft...

Since I have that auto in a 5L hempy so I can move it around... and I'm gonna be running the lights overnight as a test anyway... It won't know what hit it :D