need help ASAP

I have 4 plants and i have them on nutes , floranova bloom and liquid cool bloom. leaves are starting to turn like brown from the center crease of the leaf and they eventually shrive up. someone please tell me how to fix this and what it is

Do you got micro nutes?

Size of plants, age of plants, growing medium, pH level of water, amount of nutes your feeding?

-spek

My plants are 3 feet tall a couple inches tall, their about a month and a half old, and ive been mixing half of some filtered water with half of my tap water,(that ive left out for 48 hours) , and i was giving them 1 teaspoon per galon but decided today to do 1 and a half. And the koolbloom just 1 teaspoon.

>.< and i thought one of my girls was unwell! , best of luck mate

test ph levels after fert?? , thats gotten a fair few ppl =\

It looks like it may be a phosphorous deficiency, but it is hard to tell by the pics.

http://www.growweedeasy.com/sites/growweedeasy.com/files/phosphorus-info-marijuana.jpg

The number one reason you're not getting enough phosphorous is that your water isn't pH'd properly. You really need to buy a pH tester, and in soil, pH your water between 6.4 and 7.

I've found that leaving water out actually raises pH (leaving it out will allow the chlorine to evaporate, but not fix pH). If your pH is too high (which I suspect it is), you've got nutrient lockout causing your situation.

EDIT: I completely missed your post dj

-spek

ps. Adding above what the recommended dose of nutes is on the bottle will actually make the issue worse.

It's either PH, or overfeeding.