It isn't just one issue, it's a combination. Nothing devastating, but a slow build-up of issues. Tiz part of the learnin' process though.

If you are going to feed every watering, you'll have to adjust dose so you are giving the same ammount of nutrients per week. If bottle says 1 tsp per gallon per week, then two waterings with 1/2 tsp per gallon is acceptable.
1 tsp per gallon every watering would kill the ladies. (this is just an example, not actual instructions)

Quote Originally Posted by AnomanderRake
Thanks a lot!
One more question: my tap water smells of chlorine. Is it a problem for the plants?
Let it sit-out (uncovered) overnight. If it still smells like chlorine, they are using chlorine solids in your municipal water system, which would need filtering-out. (reverse osmosis)
I use molasses instead of CalMag.

Quote Originally Posted by khyberkitsune
I've personally never had a problem using HQI Metal Halides, and the double-ended construction actually makes for a smaller-profile lamp. I've always used HQI on aquariums, as they penetrate hardcore through water, and I've found them to be just as effective in the grow room.
You should try some 'good' lighting sometime. You'll never go back. :thumbsup:
Having kept coral and reef tanks, I'm very familiar with trying to use aquarium lighting and equipment for my growrooms. (HQI's, pumps, bubblers, actinic bulbs, 4-pin fluoro's...) HQI is a sub-par choice. Given a choice between HQI and CFL's...I'd go with the CFL's. At least you can provide the correct spectrum(s) and the heat usually isn't an issue.