New to growing hydroponically, so i got some nice pics and hopefully someone can point me in the right direction... Medium is perlite Light is 400wHPS Water is 15mins once per 2.5hours have lots of airflow resivoir is not dark (fixing that today) air stones recently added My main concern is the pH rise im currently flushing and the start pH of 6 is rising to 6.4 with 15mins constant water. And im at the 3rd flush... is this likely to indicate some sort of disease? what can be causing such a pH rise. I also suspect Mg deficency due to the pale new growth and leaves cupping up ( i got epsom salts to fix ) Ty in advance.