Originally Posted by Cactuspixie
Are you sure the problem isn't the type of sand you have? It's said that some types have sharper grains than others. I'm going to set my new tank up with part coarse river sand and part fine play sand. I hope it will agree with cories and kuhlis.
It's possible that the sand doesn't suit the cores. It's pool sand from Fleetfarm. This problem started when I added new cories to my tank 6 months ago then I've had some pass away. Before that, my cories were doing really well until they grew 2". I also suspect that it's a disease that cories are susceptible to that I introduced into my tank, instead of the high bioload in the sand. I've been reading about barble melting and many point to high organics.