one more Q - got a clown loach it's growing quick - anyhow he was showing black sots on his body - but it didnt look like it was above his skin like ick - it was hard to tell but it kinda looked like pigmentation of his skin little splotches in certain spots - but i nevr noticed it before - then today it was gone after being there for a few - think this is something to worry bout or jsut his coloration?