Ive jus moved my 2 yellow labs 1 male, 1 female (about 2") to my new 80l (uk) tank (its almost 3ft long). Its all sweet for them. wee rocky hidy place and everything. They were in my 260l tank with no problems. Now i think the male has started chasing the female around a bit. I suppose its early days yet. they are only in there an hour! Is this in ANYWAY normal?