Super iced grapefruit cuttings 2

Day 23 just taken all the big leafs off, tucket a couple more heads under the net. Was planning on flipping yesterday but going to give another week. Found a little worm I believe to be fungus gnat larvae in my tank and I've caught about 6 tiny flys on sticking pads. Day 24 today i flushed the pots with 1 part H202 16 water hopefully this will kill any larvae. Finding minimal flys on the sticky pads, only 1 a day if that. Day 25 added polystyrene between the media and plants to keep the temp down in the pots and tank Day 28. Flushed for the second time in 24hours and feeding only water. Can't control the pH. Going for 5.8 to 6.9 with in a hour, over and over. Ec climbed from 0.6 to 0.9, so I'm guessing the plants are dumbing excess feed back in to the tank.