I don't currently use the TNT but have used it before with decent results. It is really more of a tomato bloom nutrient but the nutrient needs of tomatoes and MJ are similar. You need to get one of the ones I posted and begin using it now to feed your plants the bloom nutrients that they need going forward.
Then for the next grow you can continue to use what you are using if it works well enough for you and you like the results, or you can change and try something new. Something that is either formulated for MJ or go to "organic nutes". The TNT is a good bloom nute or if you cant find that but you can find the Alaska More Bloom, That might be even better. I haven't used the Alaska bloom nute but I have heard others who said they really liked it.
Yes the pics I posted are in my current little grow space. They are about 2weeks from harvest. That is what yours will eventually look like if they stay healthy to the end. The pic above that MR1 posted is a very good pic that shows the white pistil hairs and brown (dead) pistil hairs. You do have a couple brown pistil hairs on yours, and you will see them grow out white then die off and turn brown all the way through the flower cycle. But you should reach a point in several weeks where the pistil hairs stop growing as much and the most off them will have died off. That is a good signal that they are reaching the final weeks before harvest. THAT is when you start watching the trichomes for them changing from clear to milky white, and then to amber. The more Indica dominant the plant is, the shorter(typically) the time will be between the pistil die-off and trich ripening. While the more Sativa dominant the plant is, the longer it will take after the pistils cease growing for the trichs to ripen.
Looking at the pic MR1 posted, you can barely see the leaves and bud for all the little trichomes that are covering everything. Yours are already beginning to grow those trichomes but if you look closely at yours, you will notice that they have very little if any "heads" on the stems right now. As they age, the plant will produce the oils and chemicals that will fill those heads and make them swell until they look like the pic above. If you look carefully at them, you can see that they are looking mostly milky white but I can see a couple that appear to be beginning to turn amber.
Many people here or who grow their own bud tend to let the trichomes get a certain amount of amber trichs before harvesting. The more amber they get, the more "narcotic" effect they will have. This variation of "heady" effect and "narcotic" effect varies with different strains. If a plant strain is predisposed to be a "couch-lock" high then the more you allow it to get amber, the more "couch-lock" or "narcotic" effect it will have. The less amber you let it get, it will still have some "narcotic" effect but not as much. Instead it will have a little more "heady" effect.
Now if the plant is a strain that is predisposed to be a very "heady" high rather than any "narcotic" effect, then allowing it to go longer to get a lot off amber trichs will not turn it to a "narcotic", "couch-lock" high. At the most, it would only calm the "headiness" of the high. Inversely, if you take it too early before the trichomes are fully mature (milky looking) then you can cause it to have a very "racey" high that can cause heart palpitations and paranoia. Most of the time, I prefer to allow mine to get 5-10% amber so that I know that all of the trichs have reached full maturity.