Seachem Arowana Buffer, 8.8 Oz Arowana Buffer Adjusts Ph To 6.5 From Either A Low Or High Ph And Maintains It There For 2-4 Weeks It Safely Softens Water By Precipitating Calcium And Magnesium It Also Improves The Ability Of Arowanas To Resist Infections It Is The Buffer Of Choice For Conditioning Water For Asian Arowanas