I've experienced Big Bloom and Tiger Bloom have lowered the pH to the 6 or yellow orange range with water @ 8 pH with no other additives. Right now the water from the tap is in the 6 range and I just add the Big Bloom @ 1 tblsp per gallon and Tiger Bloom at 2 tsps per gallon, with 1 tsp Cha Ching per 5 gallons. Starting the second week of this regimen just mentioned. I'm in the 5th-2nd week of flowering. I plan on flushing the last couple of weeks with just straight 6 range pH water.