Hey, so i just ran out of my up/downs for my hydro set up. Went down to the shop and the guy said he just ran out as well... What can i do to lower my PH from stuff at a grocery store that is safe? I just need it for my small 1 plant aeroponic set up. Any ideas that wont absolutely ruin the plant? Also, they are barely 3 inches tall, so i got to be gentle. thank you, you genious tokers