I got my betta fish yesterday and put him in his 4 gallon Marineland tank with HOB filter. Due to the internal reflection of the light and the tank and such he keeps sweeping along the back and sides of the tank looking at his reflection. He doesn't seem stressed out by this but he will flare up and swim around then calm down. He has been doing this on and off ever since I put him in. I am also concerned because he is so distracted that I haven't been able to watch him eat. I think he ate a couple of the little food pellets I put in last night but this morning I turned the filter off hoping he would come to the surface to eat but even when I put the food in he kept looking at his reflection. Is this something I really need to be concerned about?