Have a 10 gallon tank with a quietflow 10 filter, i' ve had a betta fish in it for about 3 months now and the other day it died. Decided to try a different fish and got platy's. Bought the api master test kit to see whats goin on in tank and have high ammonia and nitrite levels, everything else tests good. Did my water changes and vacuumed tank. found to be real dirty on bottom and now looks real clean when i vacuum it again. Went out and bought the stress zyme and used it in my tank for the first time in the morning, later on i checked the level and changed some water. still in the high range. should i wait a week and keep on the schedule of the stress ezyme adding every week and doing water changes frequently or not , please help.