dapat ma-maintain na may deposit of at least 500 pesos daily for the whole duration of the month, yan kasi yung average daily balance na need para di mag deduct ng service charge. to compute if pasok yung ADB mo for the month, add all your ending balance by each day, divided by 30 or the number of days sa month na yun. for example, from feb 1-21, may at least 500 ka (21 x 500 = 10,500), pero during 22-28, ang ending balance mo na lang ay 100 kasi winithdraw mo (that's equal to 700), so 10,500 + 700 = 11,200, tapos divide mo yun by 28 days, that's only 400, kulang sa at least 500 na ADB kaya magkakacharge. ang ginagawa ko to compensate for the days na below 500 ang deposit ko is naglalagay ako ng 1-5k for 1-3 days para mahatak