i always use urine to fix ph or whatever´s wrong.
no muss no fuss (and no smell after you´ve done it)
its best to put the urine in first, then water like normally (works alot better, dunno why)
i use good soil (near black, fluffy, nutrient rich)
rarely need to fert or use urine.
could use that ph up or down stuff and carefully find out what wrong with the plant and what stuff i need to add or flush or whatnot.
but nowadays i just go "hey the plants are bit down or yellow or whatever, and hey, i got to pee! how nice for you plants
"
few days later, happy green plants (works good in flowering too, havent seen it delay anything)
ive never burned a plant, even putting alot, but a small dab of piss goes a long way, though id put a cup or 2 if the plant was very poorly (small teacup mind you)
you could put a drop or 2 with every watering if you wanted to prevent ph troubles or other troubles and not mess so much with pee. (1-2% every time, instead of 10-25% occasionally)
this is just personal experience (picked it up from a shaman (more of a student, though teaching himself) that lives in the woods lol (though he just pointed out the pee first water next method)
not advising anyone to do this Foul and terrible method of growing.
(though must say,was kinda gross when i ran out of pee and some plants were really doing poorly (small pots too long and untended, was busy with other things)well i asked the wife to pee in a bucket for me, morning pee, smelly kind lol. never seen such a fast recovery though and i was always impressed with the results my own pee gave me..
though my wife has a much better diet and does No drugs (i eat mostly meat along with pizzas and smoke alot of weed) she eats alot of greens and stuff, plus i burn my meat to shit
though.(again) ..i also tended to use more of my clear urine, never my morning piss and i havent tried that yet (usually alot darker)
went from yellowy wilty shits to healthy green strong plants in under a week (2 days really for the most part, but kept getting better for 3 more days, now they are just growing healthily))
usually dont give them bought ferts, sometimes give them water from the fishtank (taken from the filter with sludge) that water is ferted with minerals for the plants there. (cheap ferts)
dont really seem to need anything else than that and the good soil.
dont get any smaller buds now, similar size as before. just less problems with ph.