I've got 1 striata & 1 queen loach's that have white patches on their sides, almost as if they had brushed against a paint brush, breathing fast with a tendency to float slightly nose up.
They have been in the same tank for 18mths with quite a few other loaches (3 clowns), Black Ghost Knife and a pair of b/nose, the male b/nose seems to have a strip of this same stuff running along the edge of his right fin but none of the other fish are showing any signs of this gunk or stress.
Tank is AR850(165ltr) with 120ltrs of water, ammonia 0, nitrite 0, nitrate10, ph 6.8
Weekly 30ltr water changes.
Any ideas would be greatly appreciated