at the moment im usuing stood tap water at 6.8ph (no nutes)but i said i could use mineral water at 7.8ph just want to no what would be best at this point,lights on is 28.4 celsius ranging to 30 at the moment and consistent lights of is 20-22 celsius with a oil cooled radiator in the room not tent...there growing rapidly i see improvment everyday not so much in height just leaf span and new growth there 16 days old arounf 4 inches tall 6 inches wide?