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Hmmm, how exact were your measurements, did you mix the nutes together first or add them to your reservoir one by one? Any chance of taking a TDS reading? To be on the safe side (if no one can come up with a better idea) I would flush the system with pure water.

Well you have a 1.5 cubic meter space there. (if your height is 2m and not .2m) In a perfect system, it will exchange the air 150 times per hour. If you are using this for ventilation, it will be more than adequate. If you are using it for cooling, we would need to know what kind of lights...

How old are your plants? Just about any light will work for a very short time, then the pain sets in, and everything is a total loss. Do you know the wattage?

What are you using for nutes? Your concentration might be too high.

If your timer makes an audible "click" when is turns on and off, you will be fine. Some CFL ballasts put out a lot of electrical interference, and it can mess up an all digital (triac) based timer. These timers have no audible click. Rather than try to explain that on the box translated from...

Don't stress out man. Gardening Indoors With CO2 - Worm's Way Read it, love it, relax.

Just wanted to let you know that the power supply you have for your fans is fine. The mA rating of a power supply is a maximum, you could have a billion mA power supply and your three fans would be perfectly happy. Going too low would be the problem you would run into. :mrgreen: