I started a 20 gallon aquarium this past week and added 3 cory cats to it on Monday. The first day they all hid down at the bottom, but all last night and this morning it seems like they are swimming all over the place. They go over to the bubbler, let it push them up to the top, then they swim over to the filter and let the water coming in push them back down to the bottom. They also swim up and down the sides. My first thought was that they are playing with their reflections, but it does look like they are going to the top for air quite a bit.
I checked my water last night and it looks like the pH might be kind of high? I don't really trust test strips, so I'm going to bring some to work and check it myself today (woooo science!), but if it IS high, what should I do? I don't know if I want to start messing around with dumping chemicals in the water. Its possible that the store I bought them from does water testing as well, so I might bring a sample in to have it checked.
Maybe they are just really active? I'm just surprised b/c I thought they were going to hang out at the bottom and they aren't really doing that.