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I think you'll have better results with the liquid nutes.

Critical Mass, if it's still available, otherwise, try a Northern Lights hybrid, like NL x Skunk, or NL x C99.

spend $80 and get an aeroponic timer, 4 minutes off, one minute on. It's on 20% of the time, vs. yours being on 50% of the time.

I bet your heating pad is cooking the clones. Does it have a thermostat?

Not sure, but I think 1 tbsp. of floranova per gallon would end up with ppms too high. Do you have a ppm meter? If so, mix the floranova to about 800 ppms, and see how that works.

Earl - Very nice drain(s). Much less likely to get plugged with roots than those little valves. Bravo!

If you leave the pump running constantly, it may overheat your solution. But if the room is cool, it could act as a nutrient heater. I say get a thermometer. If temps in the buckets are 70 or below, I'd run it constantly.

if the plants are in small containers, and get big, you may need to water every 2 hours, for 15 minutes. Its worth the extra $ to get the timer with 15 minute intervals, 1/2 hour is a bit too long.

Putting a shredded oz. into a cup of glycerin? Doesn't all that weed just soak up the glycerin? Sounds like the food press is a must, don't see how one could do it, otherwise.

ec and tds are related by a constant (you multiply one by a certain number, and get the other one) so there is no reason to worry about both. If you're doing regular hydro, I'd say 1800 ppm is fine.

You should cut nutes by 1/3 when you add it, or it can burn your plants. It seems to make plants finish a little more completely, hairs will start turning red quickly, I wouldn't add it until 3 weeks before harvest.

I have heard to add 2 tbsp. - 1/2 cup per 25 gallons of nutes. I had always heard 1/2 cup per 25 gallons, but I noticed on the bottle of Gravity Flower Hardener it says: "Sometimes better results are obtained by adding 2 heaping tablespoons per 25 gallons of water."