Quote Originally Posted by Zandor
I think I heard that before?

lol, now you got it dude right on.

Next we should discuess RH levels and CO²

Zandor, I'm not sure what RH level means. I would like to know your knowledge of the brix meter too. You're right they are affordable on ebay and some websites. It looks like the brix meter (refractometer) is some kind of microscope to look closely at leaves and and measure sugar levels in the leaves?

I'm using CO2 with a regulator and solenoid for timed dispersal. I use co2 a little differently then most. I have constant airflow when the lights are on. Always an intake and outake going. Since I have a small cabinet setup, I run the CO2 constantly when lights are on. I have a bubble counter (aquarium style) to give a visual on how much co2 is being released and I bought a CO2 meter to see how much is in the air in there. the CO2 comes out of an airline tube from the regulator to the fan that blows on the top of the plants. CO2 level is at about 1200. Thats about the best I can do without wasting too much of it. Thankfully I get my tanks for free through my job. I went through the 1st one in 3 weeks.

Also, I think I may have had a little Magnesium or Calcium defeciency earlier on before I started supplementing with Cal-Mag plus and Silica Blast for heat defense. I use RO water so I have none of that to begin with. Take a look at the pics, you'll see some leaf tip drying. It doesn't look like nute burn to me, what do you think? The new growth since added supplements has litlle to none of that leaf tip problem, the lower down on the plant, the more there is, but nothing to worry about.