Hello all. Ok, all systems are go,ammo is 0 nitrites are 0,did a 90% water change and nitrates are 12 mg/l. I went to my lfs and got 5 red minor tetras and a blue mystery snail.My questions are: 1. how long do I keep them in the bag,and how often do I add my water to it.And 2.do I have to do the same for the snail?