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Here are some updated photos. I put the plants on a 12/12 light cycle and switched to 3000k light yesterday. Only two of the 5 good plants are showing preflowers.

Is this a male preflower?

In the last week my plants have just taken off. I think I need to trim some of the lower leaves because they are really bushy. I am not sure what to trim and what not to. Any advise?

I have been thinking of adding alot more CFLs. I could fit 12 over head. Would that be better than the tubes?

They sell it at the kroger down the street. I use it all the time when I go camping.

Could I just throw a few pounds of dry ice into the closet and close the door. It would bring the temp down and release co2.

I kind of figured heat was the problem I have been leaving the closet door open during the day. that will correct the room temp problem. I started with a ppm of 800. I top it off every week, since I have such a big res. water hasn't dropped much. I correct the ph when I top off and monitor it...

Here are some more pics.

Room temp has been about 89-91 and water temp has been 82-84 ph6.0 and 930ppm. It is the beginning of week 3 and I was going to change the water for the first time this weekend. There are 6 plants in a 30gallon res. with a dual output air pump and 2 10" airstones. Most of the other plants...

I am three weeks into my DWC grow, and one of my plants is starting to do something weird. The bottom leaves are turning over. Is this normal or something I need to worry about.

Thanks for the great info Scottish Farmer. Let me ask you this. It is week 2. If my ppm is currently 850 could I just add so me water and bring it down 100 or so instead of changing the water in the tank? Or do I need to change the water every week?

Thanks for the info. What about my water level should I keep it right at the bottom of the rockwool?

I am about 1 week into my DWC grow. I started with a nute mixture at 380ppm I just got a meter and took a reading and it read 850ppm. The meter is calibrated properly. Is this normal, will the ppm increase over time? I am going to change the water in the tank tonight. I was going to mix up...

Its not the timer that is the problem, it is the cheap light fixtures. I will have to replace them before I start flowering.

I am a few weeks into my first hydro grow. I have seven plants on an 18/6 light cycle. The thing is My light setup will not come on with a timer. I bought alot of cheap fluorescent fixtures, they work fine, but the problem is you have to giggle the bulbs to get them to come on. It hasn't...

The plants are a week old 5 of them are about 2 to 3 inches tall and one is very small.

I have a 30 gallon tub with six plants. There are 25 gallons in it currently bringing the water level up to the bottom of the rockwool. I went by the directions on the bottles and used 125 ml of GH Flora Micro, Gro, and bloom. It seemed like alot of nutes to me. Is this right? If not what...

Thanks I will start another batch with no nutrients and see what happens.

I am not sure I have done this right. I soaked the rockwool cubes for an hour in a nutrient mix. the mix was 1/2 gallon of water pH between 5 and 6 and 1/8 teaspoon of GH Micro and Gro. I put the seeds directly in 6 of them and in 4 of them I put seeds that i germinated on a paper towel. I...

Thanks for the help. I decided to go with a General Hydroponics Waterfarm, a premade drip system. For lights I went with 2 4ft flourescenttubes at 6000K and two daylight CFLs, about 7250 Lumens total. I am going to start with just one plant and add another waterfarm and plant in a few weeks...