Hello guys, its the first week of flower day 2 the plants look healthy after doing some lollipop few days ago, i finished my PH - (phosphoric acid) i didnt have time to buy new bottle so i tried to squeeze lemos to the 200L reservoir but it doesnt hold the ph 5.8 for long, after 5-10 hours ithe ph is up again to 6.4 , i cants effores myself to buy alot of lemons and squeese every day, so i took 15g Citric acid salt and melt it with small amount of warm water, i made it concentrate so few drops can make the job done. So far so good it works fine, gonna lift up the lights tomorrow and wish me good luck for the flowering phase.