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Without pictures it's hard to tell, but keep in mind some degree of yellowing and drying of the larger fan leaves is normal once you get a few weeks into flowering

That's not correct. A bulb's efficiency is based on how much of it's energy usage is converted into heat energy. The more heat produced, the less effecient. For instance, a 400 watt HPS light will produce less heat (and more light) than a 400 watt halogen bulb. The effeciency depends on...

It's a High Pressure Sodium (HPS) bulb. The Hg symbol is there because HPS bulbs contain mercury, an element that must be recycled properly. Mercury Vapor and HPS are very different. HPS grows plants, MV does not.

An ionizer does not produce O3 (molecular ozone), not even close. What exactly was in the room (brand, model, etc.)?

You, sir, are the proud owner of a 400 watt HPS bulb. SLi is Sylvannia's commercial distribution branch, which has a plant in Belgium. LU400 is the model number of a 400 watt HPS bulb. Enjoy.

Haha... Hahaha... Number, I'm betting the nutrients didn't actually directly help the plant, but instead balanced out the pH in the soil and allowed the plants to continue growth. That being said, I would be very careful with adding nutes at this stage of growth, especially Miracle Grow...

Get ready for the most dramatic improvement in growth you'll ever see :) Make sure they have good water, nutes, and fresh air, and the sky is the limit. Good luck!

I'm growing in a small-ish closet, just two plants under a 150watt HPS with three supplemental 42watt CFLs. I have an exhaust fan blowing about 300CFM with two oscillating fans circulating air. My problem is, this is Florida, and the light-on temps in the closet usually hover at around 84-85...

Wow, looking great for just 5 CFLs. Great job.

High 70s are ok. 3 days without air exchange will probably restrict photosynthesis due to CO2 deprivation and slow the grow down a bit, but they'll pick up where they left off when you get back. Enjoy The Netherlands!

No, I'd say 2 or 3 plants at the most. You'd need a 400 watt or better for that many plants

Most people growing in their parents' house do so without their knowledge which, needless to say, is irresponsible and stupid. It's not their house to burn down or get raided. I apologize for coming off as a dousche, but it gets very old hearing these kids (or largely uneducated adults)...

Dude, don't start multiple threads asking the same questions. This isn't even the right forum. I believe your looking for the newbie section. No, 13 watt CFLs are not enough. You need at least 42 watt bulbs and lots of them to produce any real bud. My advice is to pack it up and think about...

A burning candle does not give off CO2. There's a world of difference between carbon monoxide (CO, the chemical given off by burning material) and carbon dioxide

Want to get you guys' opinion on this. These little pods worry me. Do they look like seed pods to you? They have hairs, but I just want to be sure.

I'm no fish expert, but a hydroponic reservoir does not seem like the best environment. The nutrient additives alone have me worried. Your not the first to have a problem with algae, I suggest you take the advice above and keep the light away instead of abusing fish.

If by US you mean New York City, then yes, it's comparable. Since the Netherlands got raped by the Euro in 2002 the cost of living has gone way up. I've been looking into moving to Euorope for quite some time, the Netherland in particular. Gaining citizenship is a whole other issue.

There's nothing like gardening. Of all my hobbies, I have to say this is my favorite. There's something about fostering life, tending to it, helping it along, that really puts a smile on my face. To me there's no difference between taking care of my plants and taking care of my dogs. They are...

I have to agree with title here. The vast majority of people who have continuous problems with the authorities cause their own problems. It's always the people who live in drug infested neighborhoods where police concentration is higher, the people that dabble in questionable/illegal...

I would definitely not smoke with stitches in your mouth. There are studies that suggest smoke restricts blood flow to the surface of your mucus membranes (gums, interior of cheeks, etc.), and also reduces immunoresponses, both of which would inhibit the healing of your wounds. Needless to say...