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400W MH is an excellent choice for a closet that size. It will produce a nice harvest without much fussing. I grow in the same size closet with a 600WHPS. But like everyone else says, you will need to exhaust the heat or leave the door open and yes there will be odor to deal with. You could...

I don't know the nutes you are using. Since you have smallish pots and your plants have had a dehydration problem, I would go very gently with the nutes. Start with 1/4 or even 1/8 the recommended dose and ramp up slowly every other watering. Watch for leaf curling and tips turning brown...

@Sean: Pay it no mind. It's common practice for people to post pix of their grows in other grow threads where the plants are similar. It can be useful to have something else to compare to. Of course if it comes to dominate the thread that's not right but it's hardly the case here. Auto...

It does sound like they are about to get going. 15" high is nice, but how bushy. A short plant can still be big and need a big root system. After harvest I like to pull the plant and look at the roots carefully. If parts of your soil have gotten very dry they may become water repellent and...

That's great. A simple fix. Don't get overzealous and start overwatering which is much more difficult to fix. Smell is good but it just means the plant is happy. Some strains are more smelly than others and some start giving off an odor sooner. It's been three weeks. It's time to check for...

That's pretty clever, a nice setup with little work. I guess you guys dont have much use for the shower? :) I've been wanting to make some beer can reflectors myself but I hardly ever drink beer so I am going to have to go dumpster diving.

Hey seal. Sorry I haven't been around. Things have been disrupted here. Your girls are moving along and looking pretty good apart from the leaf curling issue. The BH seems to be suffering the worst. Different strains will react differently to stress. 29c is the upper end of the...

Don't worry about it. The whole night/day temps bindiss is about eking out a small improvement in plants that are otherwise doing great. RIU has a lot of these threads arguing about things that don't make a lot of difference. As a rule of thumb, if it makes a big difference, then it's...

If you want to control the height of your plant, you can use LST together with topping, but LST is more general than that. It's a method for shaping the plant and is mostly done to ensure the plant gets as much light as possible.

What WattSaver said. The ballast for an HID light is both a transformer and inductor. As a transformer it ramps up the house voltage to about 400V depending on the bulb. A PC power supply produces 12v & 5v. Most likely it's a switching unit which means the transformer is an itty bitty thing...

If you give the plant everything else she needs when she needs it, then your yield will depend directly on the amount of light she gets. Once you've bought as many watts as you can afford, the next improvement will be in the way the plant's canopy is arranged under that light. LST is a...

IMO he cut too much off the reflectors, they should have wings at 45 deg to cat the light coming off the sides. Other than that, looks very practical.

Bat guano is a nutrient but it's composition varies. Some are very high in nitrogen, some high in phosphorous. In any case you have to be careful how you feed it to your plants as it's very 'hot' and can burn the roots.

Yes, you can use any switch rated for 120V and more than 2A. BTW if you like to fool around with electronics, an old PC pwr supply can be a good workbench supply.

I've never wired up a 70W HPS ballast, but the one I have does have an ignitor. With a magnetic ballast, the ballast and transformer are the same thing. Digital ballasts are comparatively new. I have no experience with them. This is what I am used to

They all look very good but two are a little droopy. It may be the heat from the lamps. Have you checked the temps? The wattage seems about right for your cab but you have to watch the heat. Now that you have real plants, you want to get them as close to the light as you can without...

I kept my young plants in my mother in law's green house while we stayed there for a week. We told her it was Italian Basil. She over watered them. :)

You can clone in soil, plain water, rockwool, aero bubbler etc. They all work. Some are a bit slower, some have a higher success rate but they all work. Rooting hormones help significantly but are not necessary. It's important that the cutting not have too much green leaf material. With...

What Redneck said. They look good but stretchy which can become a serious problem if their stems fold over and pinch. If it were me, I would put another 1" - 1.5" of soil in those cups to bury the stems and slowly bring the light as close as I can. With flouros I would expect to be no more...

HID ballasts use high voltages. Several hundred volts to run the lamp and a 3-4 kV pulse to start the arc. If you miswire it there is the possibility of even higher voltages. This is not a situation where you guess. Usually on these ballasts there is a white common lead on both sides of the...