Do clown loaches burrow under gravel?? My two have dissappeared and I can't find them, their not in my filter and they aren't in the cave I have for them. So I was wondering if they burrow, thanks for the help in advance.
Maybe if you post a pic of your tank,we can steer you in the right direction..from my experience with Clown Loaches,I've never seen them burrow into the gravel at the bottom of the tank I keep them in..in any case,whatever you've chosen to layer the bottom of your tank with shouldn't be more than a quarter inch thick,so that should rule out burrowing...but like Butterfly pointed out,Loaches will really find the teeniest spaces to cram themselves in..so just about anything in your tank besides plants could be where they're hanging out.
One of my clowns is pale all the time,but some times the other bigger one goes pale too and then they start to do a funny dance and race around the tank, then he changes back to dark and it all goes back to normal.Its like Butterfly said the pale one is more dominant.