i live in columbia sc and am from charleston which is on the coast... we have lots there. i collect them there and bring them back. ive got a 55 gal. sump on the tank and half of it consist of the overflow tube that goes into a large exposed sandbed. the overflow tube is down in the corner buried in the crushed coral under the sandbed and the sand acts as a filter. on top of the sand ive got rubble live rock to hold it in place... ive found that this little area makes a great ecosystem for up to around 50 fiddlers at a time so i just keep it perminatly stocked... the fiddlers aslo help eat all the detritus that comes down the overflow