https://www.reef2reef.com/threads/the-microbiology-of-reef-tank-cycling.214618/
Yes you'll be fine
We're reviewing ammonia test kit variance in several active threads, rarely is 8 the number another tester would report and even if it is, that won't sustain it will go down. You have to make cleaner solution levels to turn cycling ammonium chloride into a sterilizer. Any variation you make to directions on the bottle is adding algae feed it's not going to kill off the nitrifers when all said and done
This is precisely when people's nitrite testing goes awry but it has no impact on final cycle either way. Instead of basing your cycle on this high ammonia waste water, per the microbiology of cycling thread you can also just let your current mix stew for 30 days, do nothing more but wait, and then change out the water on day 30
The new water tests great because it's all nsw, so what you might test as peaks/troughs in bounds/out of bounds in the interim doesn't matter one iota, testing is not required to cycle. Water feed and bac handle it fine alone no exact levels required.
Doing the full water change exports the out of balance waste water and algae feed
What's left behind during the water swap is the entire filtration system costing all surfaces as biofilm because for thirty days per one million google cycling charts some ammonia + bacteria water sat for a month and did the chart line regardless if we tested it
No amount of water changes removes that filter scum, forever. our entire scientific basis for cycling in this hobby is based on using guesstimate titration on varying degrees of wastewater. Bacteria have been doing what google cycling charts always said they do, on the dates provided across charts. We've just been testing in the wrong context
The next time we read a cycling article from any author and it leaves out what always happens by day 30 in a boosted system, wastewater vs clean water retesting, and how testing misreads never change what bac do anyway- be skeptical