So after a fairly easy fish in cycle, I am left with 3 neon tetras, a bladder snail from the plants, and a male guppy. This is in a 29 gallon btw. The guppy acted normal for the first week or two but now he starts around the tank real fast and skims the glass darting up and down the glass. He basically acts like hes a crackhead. After he does a bunch he sits at the top of the tank for around 2 mins then goes back to swimming. Sometimes he swims normally then he just bursts into crackhead mode. The 3 neon tetras are peaceful and swim normally. Is this just the guppy being stupid or is there a problem with him?