My fish are dying and I'm not sure what to do.
75G FWFO - no plants
ammonia 0
Nitrites 0
Nitrates 60ppm
I've been doing PWC every 2-3 days to get Nitrates down. This is an old tank which has had high nitrates but the fish are new.
About a month ago, I bought some neons, 2 angels, 2 glofish...