if he didnt always act this way it might be because that fish is sick. what are your
water quality parameters, ammonia, nitrites, nitrates and pH? do the physical on the
fish see if it has any problems.
http://puregold.aquaria.net/pg/disease/technique/technique.html#Jo_Ann's_Fish_Physical
if nothing else, do some 50% water changes 3 days in a row and see if the fish perks
up. Ingrid

"DJ" wrote:

Hi everyone, Im new to the group

Ok, tank info, 50 gallons, side filter, 4 large (ish) goldfish. However, the
smaller of the four spends most of his time hiding under the filter, have no
idea why, because he seems healthy, and so do all the others, he does come
out sometimes, and the other fish seem ok with him, but I am wondering why
he hides?

Thanks
David




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