Hey everyone! I have a 55 g with dojo loaches and a variety of cory catfish such as blochi bloch, julii and agassizii. Unfortunately the cories have been passing and I'm unsure why. They have been flashing but the water parameters are good 0 ammonia, 0 nitrite, 10 nitrate. PH is a little on the higher side 7.6 or 7.8 due to the hard well water. I've checked source water nothing odd there. I have reason to believe its a parasite due to the flashing. They are also hovering, not resting on the bottom. Some of their gills are red down to the bottom little front fin there right under the gills. I've been treating with API General Cure but it hasn't gotten too much better for a couple of the cories. I'm scared to use clout because it is so harsh. Any ideas on what this could be and how to fix it? Any input is much appreciated!