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Depending on the wattage of your ballast you may need a relay to stop your timers burning out and melting the contacts.

Drip feeders or DWC, drippers might be better if you've got a limited space though. Waterfarms look quite good too but not got any experience of using them.

Use their grow schedule, seems to work fine

Thanks, looks awesome mate + rep

How many plants you got under the screen??

LST or top it as said above.

I thought JDS was going to win but not that quickly! Was a bit surprised although all good.

Too many variables to give an accurate answer I assume from the orange hue to the 2nd picture you're using an HPS although what wattage, how big is the room, etc?

Subbed. I've used Greenhouse last few times and had good enough results but just read a thread slating them so will try someone else for my next batch.

Does this work? Will give it a try in the interim not going to be able to get to the shop to get some PH down for at least a week.

No worries, I am amazed by the relative simplicity yet massive increased yields of Scrog growing so have been swotting up a lot!

Can anyone offer me any advice on how to best to change my PH? I live in a hard water area and my nute mix is coming in at around 7.1. I've checked the soil and it seems to be around 6.8 so in the good range but don't want to ruin my hard work setting it up with the wrong PH nute water.

Should I have my screen that low? I've started training my girls with lots of lst to get lots of main stems but the pots are still about 9-10" from the screen (plants are probably about 5 inches from it) should I put something underneath the pots to raise them a bit nearer?

I'm no expert but as the holes in the screen too small, also they look like they'll have an edge which I'd imagine isn't ideal once you are training the plant through it. *disclaimer* I am not very knowledgeable and am on my first scrog too the above is just based on what I've read on here...

I generally don't use any nutes on the seedlings other than a 1/2 strength solution of bio bizz root juice for a week after they've sprouted and either gone into the soil or rockwool plugs. You have to be very careful with small plants definitely sounds like burn from the nutes. Unless you're...

It will grow under a normal bulb but not particularly well, as said above heat will be an issue with a normal bulb though and if you've got inside a bin lid with it close it's going to get very hot.

Never knew about the contamination thing although I guess it makes perfect sense, Thanks.

Did some more again tonight got most of them sideways now, might have to move them up nearer the screen though. I built the screen to be future proof as only using 2 gallons pots at m and they're quite low so got about 4-5 inches from the tops to the screen. I just wish I'd known about scrog...

Thanks started training tonight, some of the lower branches are almost as high as the main stem now I've trained it over on it's side, should get a lot of good colas.

I've used Bio Bizz for years and always had good results (much better than Canna and Growth Tech Ionic nutes)