I use aqua prazI from Aqua Meds for treating flukes. When reading how to treat for them here it was suggested to treat 7 days after the first. The directions on the container say after the initial treatment do not do a water change for seven days. It also says you may need a second treatment but gives no time period after the first treatment. After reading the instructions on their website it says you can do the second treatment after three days and then no water changes for seven days. I was wondering if the seven day waiting period for second treatment as a generic time or is it specific to a particular brand.