help big bang goin yellow

i dont know what to do,my big bang plants are in 2 flower but 4 out of 5 have gone yellow with green vains on leaves,heard may be overwet so now im not watering today but my plants norm dry each day and i was waterin 1 time per day about 1.5 litre over half an hour,but have now auto water pump which is set 200ml 5 times aday,does the fact its being waterd often causing the yellowing?and will yellowed leaves turn green again if problem sorted?have i lost plants budin strenth or will recover?help my 3rd crop back 2 green

Thats too much water, the yellow leaves won't come back. If your in soil water then wait until the top 2-3 inches is dry then water again.