Loaches Online Forum

First of all, what species is you loach? Generally speaking, most loaches require higher temperatures and a slightly lower pH than most goldfish. As for the gill infection, it's possible that your loach could have gill/ skin flukes. Goldfish often carry flukes. What are the ammonia, nitrite, nitrate...

It could be lack of oxygen. If there are a lot of fish in one bag and they're left there for more than 15 mins, oxygen in the water can quickly become depleted.

Do one cave at a time so they have a place to hide. They never like to be bothered, but tanks do need to be cleaned!

Mine are named Crafty, Spot, Lincoln(I bought him on president's day), Spike, Springer, and Turbo.