i wasnt watering them too much, i was using the finger technique in the soil to see if it was dry. but in saying that i did flush the pot a while back because the ph was way to high, i didnt have a tester and didnt realise my tap water was reading 7.8. so i flushed the pots and left it for a week or so for it to fully dry before watering it again. and only use a quarter of the specified amount of nutrient needed. Everyone keeps posting about my watering but im only watering once every week so maybe even thats to much for them. ill stop watering all together till they show signs of being thirsty then feed them again. hopefully this fixes the problem. thanks again for all the help. im writing this all down so i dont have to goole all the time lol