hi all. i have a ak47 in vegative growth in a 17 litre flow grow about 12" tall in clay pebbles. i also have 4x hash bomb plants in a atami wilma in 11 litre pots with clay pebbles. both are fed with dutch pro grow nutes. the bottle says to use 2.5 - 3.5ml per litre. i am giving my plant 3.5 and water ph is 5.8. how comes i have red branches? should i up the nutes