noob hydroponic plant problems

-indoor or outdoor-indoor
-soil, soilless, or hydroponic-hydroponic
-specific medium-hydrotron
-Soil type/brand
-Hydro/aero/soilless system type-aero
-Anything you have added to the soil
-Soil pH
-Water source-tap water (has a ppm of about 150)
-Water pH-6.0
-Age of plant-6 weeks
-Type of fertilizer-ionic bloom is being used now that the lights are on 12/12
-Rate of application-1/4 strength (500 PPM overall with tap water)
-Lighting source and distance from plant-8 bulb t5 with 4 grow and 4 bloom bulbs. Light is about 15 inches from plants now because I cant figure out what is wrong.
-Temperature (both day and night if you are running a dark period)-80 at most during the day and about 60-70 at night
-% Relative humidity- 40
-Lighting schedule-12/12
-Type of ventilation your room has- using grow tent and have a couple of the vents open with a regular fan on 24/7

First off I would like to say that I have been browsing this forum for a couple months now and it has helped me out so much in my own growing and I would like the thank all the people that take there time to help us noobs. Now I starting growing around valentines day and the plants were doing amazing in the aeroponic setup (rubbermade bin with fogger and mister and bubbler in the bottom. Now when I switched to flowering is when all the problems started to pop up. The first day that the lights were on 12/12 I changed to the bloom and boost nutrients (not sure if that was right to do). After about a week started to see the leaf tips were burning so I went to about half strength. That was about 2 weeks ago. Now last week my tds meter finially got here and a checked my res and it was at 2000 ppm ( way to high i thought) and the ph was around 7 which I read is way to high for hydro, so i adjusted the water to about 6. Then I went back to 1/4 nutes and this week they just look worse and worse. Will post some pics too (sorry they wont be the best no digital camera. Well I hope that this description is accurate enough and that someone can give me some answers to whats wrong. This is really just my trial run before I grow the expensive stuff, but would appreciate some bud for the work that I put into this project.