hey, iv been cycling my 13 litre tank for 7 days and have had the water chemically tested in 2 different pet shops, both say the levels are fine. however i bought a new betta yesterday, he was fine at first when i put him in the tank, but later in the evening he begin to act strange, he was laying on the bottom of the tank on his side, what does this mean? iv transferred him into a different tank with water which has been treated with tap safe, ammonia and nitrite remover. he doesnt seem to be able to swim to the surface. please help :( :(