sorry if this has been covered before but i could not find anything quite the same as what i have going on. also I'm not sure if this should go here or in the aerogarden section I just started doing this. and this only my 2nd post here at RIU. so i am using aerogardens. i will call them 1 and 2. i have been adding to my setup from the start. 1 in a grow tent with a 150 HPS and an air pump. 2 is outside the tent and has the areogarden light and an air pump. 1 in the tent is flowering and 2 is just starting from seeds. 1 i have been using thechnaflora recipe for success from the beginning (from seeds)and they are currently one to three weeks from being done. i started with 1/2 half strength and slowly bumped that up each week watching carefully for signs of over feeding and now at full strength. so far they look very nice to me. like some of the pictures i see here. 2 i am using the Lucas formula with 5ml of pro-tekt. and 2 drops of superthrive. i bought the starter kit of that too so i do have the rapidstart, floralisious plus ,florablend, liquid koolbloom, florakleen. Even though i like measuring out all the little bottles of stuff it makes me feel like I'm really doing something, like a mad scientist or a smart person. The florablend had stuff floating in it, so after lots of reading and other people that don't really know saying it seemed like there was a lot of overlap in using all of them i decided to try not using that stuff. i tell you all that so i can ask these questions. my ph drifts every day. i started with gallon jugs of sprain water from the store. A few weeks ago i bought a zero water picture and have been using that, what a pain in the ass that is . I have been mixing a batch of food every week set 1 with the technaflora the ph is always a perfect 6. On day 6 i drain that food water and put in plain ph balanced to 6 water. Then the next day i drain that and ad new food water. When 1 was started and all through vegg mode the ph kept drifting up to as high as 8. i use a few drops GH ph down to adjust it to between 6.5 and 7 but i am scared to add too much. As soon as i put them into flower mode the ph began to drift down every day to as low as 4.7 Again i use a few drops GH ph up to adjust it to mid 5s and again i am scared to add too much. to adjust i add a drop of up or down wait a bit check it trying to use as little as possible i think i have used up to 7 drops at times both directions. now with set 2 (from seeds) using the Lucas formula with 5ml of protect. and 2 drops of super thrive i have had to ad ph down to get it to six, again using more than i think i should. Again the ph is drifting up every day. they also look nice. they may be a little thin and tall... they are young and I'm new. so... why is it drifting? is it normal? how much of this up down stuff can i use? Is it amazing anything is still alive let alone looking good? i don't have a TDS or PPM meter. I really don't know what to get and i just got the ph meter $ and still need a usb microscope $ or something. I was using the GH test kit before but i was throwing away my water every time i tested and with only a gallon to start with... so yeah... if you'r still reading this thank you. if you have answers or advise to offer thank you ahead of time.