Hi, my husband and I bought 3 chain loaches a few days ago for our 100 litre tank with tiger barbs, a krib and a bristlenose catfish. 2 of them seem to have made themselves at home and are exploring together all over the tank, 1 is constantly hiding, may be seen briefly at feeding time then disappears again. Should we be worried or is this one just taking more time to feel confident enough to be out and about? We know 3 is a small number but we plan to buy more next week when the shop gets more stock. We had a group of 3 yoyo loaches for nearly 10 years and missed them when the last one died some months ago. So when we saw the chain loaches we had to have them!