Sorry for the lack of details. The original # of goldfish was three, roughly
1+" in length w/o tail. They've only been in the tank for 6 days and so I
don't think over stocking is the issue. The two left are holding on, barely.
I changed more water this morning, to no avail. I haven't checked my nitrate
& ammonia since I've relied for years on the philodendra and other plants to
keep those levels down and I did a massive water change a couple of days
before putting the fish in.