hi i today purchased a male fighter, im a bit nervous as i thought they were quite active and more mid to top dwelling fish, hes in a 190l tank, but has spent a fair bit ogf time either swimming round the bottom of the tank or hiding and squaring himself off under rocks, is this natural behaviour, anything i should be worried about? i tested the water this eve, ammonia read between 0 to 0.25 nitrate 5.0 and nitrite 0, appreciate the help guys, be gentle if iv done something seriously wrong /