Hey guys, i have a 240 gallon tank and a 60 gallon sump underneath, i put my coolie loach in the bio-balls thinking he could hid all day but after a month of not seeing him I saw him hiding in the rocks in the 240 gallon tank with my oscar marble catfish and my 4 goldfish. How he got there I have no idea. He's been in there ever since. Has anyone else a sneaky small fish living with large fish?