I'm glad to hear that the plant's are rebounding,but i'm going to have to disagree with you about the necessity of leaching the rockwool of the lime and calcium,after i stabilize and set the rockwool up i adjust the(reservoir) solution to 5.5,and recheck after the first flood cycle is complete,and there alway's is a slight rise of 0.3-0.7 at which time i re'adjust the "ph" lower to about 5.8 to where it usuaully stay's,then i check the block's with a soil "ph"tester at where their around 6.1-6.3 and there the reading's will be consistant throughout the rest of the grow,i flood my system at 8hr interval's.each cycle is a1/2hr.at the rate of hand watering you're using, it will be sometime before the medium is stable,in the meantime you are risking a secondary nute lockout,but if the method you use is working out for you by all mean's, then use it.as far as you're lighting goe's,I also use a 430WT hps that i keep at 12" above the canopy,with a overhead exhaust and a occilating fan between the plant's and lamp,sorry if i sounded critical,i did not mean to,just a simple disagreement,welcome to the forum and keep us posted on you're grow....good luck....bonbon