Stunted clones. no growth in 3 weeks

all of the big leaves on my skunk #1 turned yellow and fell off. and my other 6 atomic haze looks pale yellowish white. but i think i have noticed a little something since the 2 doses of super thrive ive given them. and i fed them all fox farm growbig for the first time. i havnt given them any fertalizer for the past 2 and a half weeks because ocean forrest is so hot. i thought the new soil would be fine. the ph is between 7.1 and 7.3 on all the plants run off water. heres some pictures.

ph is too high. get some ph down that should help them out.

how do i lower my ph? cant i use fresh lemon juice to do that? how much per gallon?

it all depends on so many factors. You need to fertilize them though, if even just foliarly. Phosphoric acid is often used to lower ph. you need to invest in a ph meter. , or get a simple ph fish drip test ($5 at petco) Ive used vinegar before too.

Go easy on those nutes, I find that every time i clone my girls get really sad looking about 2 weeks in, the leafs will turn a little yellow as the clone uses it for food until its roots have set. I have trimmed my clones down to a pure stump, no leaves, and sure enough she came back. They are resilient little fellas, just keep giving them your love, fix that PH, and you will have success.

i have a digital ph tester and my run-off is about 7.4. so i need to flush my plants and get the ph to a 6.5.