Question about microbes and PH

[KDB42]

Just to make sure. I have a gallon of aquafina water the ph was 6.6. I added 5ml bloom city super microbe root stimulator as directed and the ph went down to 4.2. Sho l d I adjust it back to 6.5 or leave it alone. Dont want to kill the buggers lol or my girls for that matter. @Aqua Man I always trust your advice any thoughts?

 

[Dub_City405]

Never give you plant ph out of 5.5 to 6.5 ph range. Ever.

 

[KDB42]

Thank you for answering. I ended up putting a little of my well tap water in and it raised the ph to 6.2