best dys ph down?

I went to water my plants just now and forgot to get new ph down, what's the best thing I can use around the house for this one time?

lemon juice will work but only for a few days

Its just for once I heard of lemon juice..i was gunna use that lol. But why can i use it just a couple days..i usually just ph the water when I water..

well in hydro the lemon juice just stops working after a few days idk why but if your using it in a watering in soil then it should be fine

Yea growing in pots..thanks man ima try it

I am using apple cider vinegar for pH down and never needed any up.

I was downing pH with apple cider vinegar, but later I found out that in soil/soilless setups you do not need to dump it down cause soil has a buffering property and does that for you. So I stopped putting it down, and never saw the difference. I'm watering with 8.5pH.. Saw people adding dolomite lime to their mixes which also puts it down for ya.