Gotcha. I just purchased a small floating thermometer but I stuck my hand in there this morning and it was cool.
I think I may have my light too close, the leaves are starting to look dry but still green. It's about 8 inches away... I think I'm going to drop the tank about 4 inches just to be on the safe side.
Well, I also noticed that they all have string like roots well into the water.
Here's another thing I was going to ask you. How long do you leave the 1st nute tank in there ? I had just plain water for a few days, and then added a couple tsp's of Botanicare stuff, then the full monty, so they've been in the tank with the same water for over a week. I don't have a ppm meter and am using PH strips and everything seems fine. I may do a flush within the next couple of days just to be on the safe side, whatcha think ??
Yes, I'm veggin' with a 400w HPS. The roof of the area that it's growing in is about 15 feet or so, it's about 1000+ sq ft area, all exposed on top. When the heat escapes the many gaps in the growing area, it just goes up... and it's on concrete so it will be fairly cool in the summer. I'm not worried about heat then, just smell really.
And as far as getting them tall, I'm going to try and go no more than 36 inches if I can help it. Again, this is just for my personal stuff, so I'm not looking for severe quantity just quality... but of course I want to get the most out of my grow.