leaves are turning yellow from the tips

Too hot soil mix. Don't fertilize, don't give cal/mag, just give plain water. Transplant the little one and if using decent soil, they will not need feeding for 3-4 weeks. However, they will be fine, just don't kill them with kindness....... Also, 18/6 is optimum.

first check pH... soil slurry or runoff... which for runoff i'd wait for regular irrigation timing so as not to overwater. with slurries it's best to be consistent with the volume of soil you use, don't use it from the very top layer where most evaporation and increased EC occurs naturally. Also use same volume of water at a known pH. slush it around and test... don't expect it to hit your target pH with either option as it will potentially be different under normal circumstances... if it is WAY out of whack, then it is a bad sign.. slgihtly more acidic is potentially a non-issue as the runoff likely has a bit extra solutes in it that tend to be acidic when it comes to fertilizer. if pH is fine... give it more Nirtorgen... tip-in paling from bottom up is a N-deficiency once you eliminate other possiblities. FF kinda sucks, i hate to say that because it can cause buyer's remorse.. if it makes you feel better i wasted my money on FF trio for my first grow. it's an incomplete and imbalanced diet with need for supplementation in ways that are easily avoidable with a better mix of nutrient products. Can you grow things perfectly well with it? i'm sure you can with extra effort involving trail and error to figure it out than necessary. Hell, with ff, you could be lcoking something out and not realize it. it's so poorly balanced for nearly all plants. Use 1/4 - 1/2 srength of whtever thos FF bottles say. only slowly increase and allow plant to react to any change so you can observe and ensure it's okay before ramping up concentration further. watering habits could be at play too -- with soil allow top 1" to dry and then water -- whether fertilizng or water-only. You want minimal but some runoff to ensure you don't have dry pockets as this is where crazy shit can happen over time.. maybe fine if you diregard this suggestion a bit or even for entire grows, but at some point it will bite your ass, so just avoid it with a little runoff at bottom. Minimal, cause your runoff is just wasting nutes in the soil. Even if you are trying to make due with a small plant in a large pot... that column of wet substrate around the small plant should be wet all the way to the bottom, or else you'll get more superficial root growth than you want... you want those roots driving down to bottom and not growing toward surface where erosion and compaction will eventually expose it to light then those roots won't be functional roots anymore cause they will differentiate and shed the hairs... be little stwigs along surface of soil doing nothing useful in regard to water uptake anymore. Root tips sense water. if one side of the tip is dryer than the other, they way it grows will actually make it turn toward the wetter half.... it reacts locally.. not a "decision" but simply reacting to how wet the soil is in various directions, that is how they will "find" water. so if dry below, they will turn upward toward the surface where there is more water, if you don't water all the way down the column beneath it. anyway, re-irrigate when top 1" is dry, feel weight of pot and that's a much easier signal to water... will also make the water required consistent to get minimal runoff, so you can only mix up what you need in a fairly precise way per pot. Never blindly pick a volume to water with.. always give what is necessary and then in hindsihght after first irrigation plan for that in future. kinda have to work backward from first irrigation cycle use. your small plant in big pot is a little different context, just make sure it's wet all the way down in that circle around plant.

what kind of help?

Hi! She has a root problem! Check for pH and ppm (6.3 and 300-500 the best at this stage) probably too much water damaged the root, and plus something Is wrong cause She Is not eating fert! The plant in the big pot will recover fast without problems , the One in the small pot Need some help, but She Is strong