i always test the ph after i add nutes to water and thats the price of my tester probably similar,can this happen after alot of stress couse they where in a toxic growbox for 2 months and i couldnt figure out what was the problem till i found this article on icmag that had the same problem as i, after i dismanteled the growbox they recovered beautifuly ,so could this be the couse of these pale colors