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yes phosphoric acid would work but you have to check concenttration or else you might lower it to much. or else try to buy phosphorous pentoxide(anhydrous of phosphoric acid the same way as supplied into feerilisers) from a laboratory store and ass around 300mg to 500mls of water

I think phosphoric acid would be the best way to lower the ph since at the same time it will supply the plant with phosphorous... later on when ill have more plants i tend to try using a phphorous ph buffer like using a sodium di ortophosphate solution adjust it and it is suppost to handle and...

just flushed my pots with 2 ltrs of water each hope to fix the problem...

bottled water.. so ph of soil should be around 5.7 ? and what do you mean once in a middle day u mean every day at noon ?

it is 14-10-27.. so what i get a ppm meter and when im going to feed them i check the ppm of solution ? and how much should it be ?

they are into flowering... and no i dnt have a ppm meter i was using magic grow because i red its poisen for them but i just bought phostrogen havnt given them yet

i dont actually know so it might be that they turn yellow and die even if they need more light ?

florecent tubes giving them abit less than 12hrs a da right now with a timer will add an led grow light heard they are making loads of sucess over other kind of lighting low power consumprtion better efficency and less heat

this is first time.. they are around 6 weeks old and started flowering around a week nd 2 days ago... lower leaves started to turn yellow at first until they curled and died.. till now no sign on upper leave. from what i've seen on the net might be a phosphorous defitency so 2 days ago i gave...