I know Clown loaches are called clowns because of the way thay act. i have 6 Clown Loaches the biggest is about 6 inches.the smallest is about 2 inches.The smaller loaches get right up aganst the bigger ones around the gills and it seems like it is stuck there.the big loach swims like a mad fish but the little one stays right with him.. is this normal or should i worry about something? i love my Clown Loatches and dont want any thing to happen to them.