what you have is magnesium deficiency. looks like you have more than one fert problem but if what you're giving doesn't mg to it, try this: get some epsom salt at a drug store and put a teaspoon in a gallon of water and give that, not all of the water but some of it like half a pint to a pint. let the soil dry out. you're long into flower and there isn't much budding. it looks like the plant is pretty short and bushy, an indication that your light might be too low. don't worry about you're pH. don't flush with just straight water. don't put lime or anything else in water to raise the pH. don't over-think growing a plant. if you want a more complete fert, then get dynagrow there's only two to choose from. get the one that's right for the time cycle, either veg or flower. don't overfert a plant. don't fall for all the different products in a grow shop. study real plant science, not the stuff you read in internet forums. you don't have to get complex but there are some things to know. maybe write a fert company and ask what they suggest just don't tell them what you grow, but of course they already know that much, that's why you use their products. try a better soil if you want where you just add water, search for sunny girl soil on the web. comes with instructions shipped to your residence, easiest thing you could ever do.