Poorly Clown Loach

Initially, the best thing is to make sure the water is super sparkly clean. This does mean a few extra water changes. This is usually enough for the fish to heal.
If it does get infected though you'll need to medicate. Do you have anywhere to move the loach to for the duration? You can steal some media from the main tank to run in a hospital thank. You wouldn't need much for one fish. I would be inclined to throw it away afterwards in case any trace of them med left in it killed the shrimps if you put it back.

It's making sure there's no muck sitting on the bottom that's the most important thing, especially with fish like loaches which live on the bottom. Bugs getting into the damaged areas is the problem, keeping the bottom nice and clean is the best way to achieve that.

sad to report that the clown loach passed away in the night , everything seemed so fine when turned the lights and air pump of for bed then woke this morning to find he has passed away sometime during the night . The 3rd and final loach seems to be ok swimming around like a fish on drugs althow he does seem to look for his mates sometimes , i do intend to replace the two deceased loach's but was just curious would the 3rd loach be ok on his own till the weekend i dont want to cause him any stress by being on his own and if thats the case i can try and get out on my lunch break from work

i checked both the dead ones for white spot and all looked ok i will keep a very close eye on the 3rd one to see how he is getting on, i might try and go out sometime in the week on my lunch break and get him a few companions to be with( sorry boss my fish was ill seems a valid excuse to me ).yes my eventual plan was to have 3 last weekend and to keep my eye out on my ammonia levels etc then in one or two weeks time if all was ok with the levels to get another 3 as i didn't want to  put to much of a strain on my bio load in one week.