Leaf problem, Nutes? Lights? Advice aprieciated

I am on week two of flowering, using cfls, my plant has had a few leaves looking brown on the edges and coming in eventually turning yellow, I just trimmed them off when i was in veg but now the uppper leaves are starting to curl at the tips and dry out. I have been using Nirvana's soil tabs and flower tabs as all my nutes using natural grow soil. I have been using distilled water, the fans have not been running at night as well. They are Nirvana swiss cheese plants both about 2 ft. tall. Thanks

one of the first leaves, just now taken picture. Others got worse this one didnt get worse
Almost the top leave, all of the leaves around the top just now started to curl within the last day or two.
This is one of the middle leaves thats has been like that for a while. All pictures taken today.

Also I have read two growers books and looked at hundreds of pictures but cannot figure it out, my best bet is Zinc deficiency or the distilled and bottled water I have been using.

Yeah I don't know what I was thinking when I bought the soil, some natural stuff from home depot.
i have been thinking of switching out the soil but not sure if it's worth the stress on the roots and how much dirt I should remove from them.

i wouldnt switch now, but it looks like they are getting cooked looks like nute burn. feed them just water for a few days then start with half of what ever u were usuing. if the soil has nutes and you are adding nutes might just be too much. also check your ph make sure its between 5.5 and 6.5

waaaaay to much nutes

They are nute burnt. Its about impossible to light burn with cfl. You dont have a deficiency.FLUSH FLUSH FLUSH. Fill the pots until water is filled completely to the top, allow to drain, repeat in 3 days. I wouldnt transplant though. Dont worry about hurting them more. Give them thrive alive or some type of B-1 to reduce nute burn stress. I would reccomend applying with foliar spray to the underside of leaves right before the light comes on. After this start your babies off with 20% nutrient solution then raise weekly by 10% until your full strenth is achieved. You can use reverse osmosis water from the fill your own stations at most grocery stores. $ 1.50 for 5 gallons. The ppm is only like 20 and PH is around 6. Dont worry too much about them, they are very resilient. Follow these instructions and they will be fine. Hope it works out for you.

awesome thanks, I will get some of that water and flush them out and go from there.

Thanks Saltwater