This is my 2nd grow and my 1st was a big failure. im using 400w hps, 10gal, dwc, 6plants,bagseed, ph 5.5 ppm 265, 4th day switching from something wack to FloraSeries. my plants are now 23 days old and i added 1/2tsp superthrive and i also added 1tsp of epsom salt in 8gal of water for the first...