This Update came a little bit late cuz time issues but here is it :) Last week i had solution issues and the plants go very fast in bad leaf color. The Solution got too warm in the tanks and the water got a bad smell too. I changed the water and made again the 3rd week nutrition and turned up the fan to get a few degrees colder it worked very well. Roots are so far doing nice and have no burns or rotten parts on nice and white. Then i installed the second light in. The week before i give them 400 W MH and 100 W LED. Now we have 2x 600W and 100 W LED each one turned down to 250 W and the going good. But i had only 1 bulb m MH and so im now have a mixed light end of this week i give them 1 tsp Mineral Magic over the stem to get them stronger Mostly of them are Topped and have not bad mooding on the growing stage of the plants. I hope on get a few Tips on what we can do better on the System Best Regards :) and Good Groow @all