not sure what you mean. plain water, since they started "showing"? when i have had my plants, in bloom, and they are down to only say 3 weeks to go, to finish, i give just water, for two waterings. then, i flush the heck out of them. say, thirty gallons worth, for three plants, each in 4 gallon pots. i have a large tub, that i lay two 2 x 3 boads on, to sit the pots on. then, i use an airiator head, on a hose, and run water thru them, until my ppm meter, reads like 250. my water, plain, is like 130 ppm. mostly calcium. when i start, i test the water, flushing, and its usually high, at over 1000 ppm or so. when it gets down to like i said, about 250 ppm, i let the pots finish drippinig into the catch tub, and put em back where they were. at this time of their lives, they dont go thru water, every 4 days, like when they are in mid bloom. but, if they need any water, between the flush, and harvest, i just give them a regular watering, perhaps with a bit of molasses in it. i consider my timeing perfect, if they are close to needing, or needing, a water, on chop day. and, i usually take two or three days to chop and trim. i get tired of trimming. lol. right now, i have four blackberrys, and two gods, that have like ten days left. hope this helps.
please help as family coming over at Christmas so if I don't sort these now they're going in the bin! It could be temps because there 33c but my 2 previous grows were fine I'm doing everything the same pretty much. I've only fed 1 watering with bloom when I flipped the lights 
