Hello Everyone,
I am a newbie and just set up my tank about 3 weeks ago. The infomation that has been around is most interesting and useful. Thanks to all. Right now I am just letting the system run and let the bacteria 'grow'. The problem I have is that after putting in the rocks I have now noticed that there are a lot of crabs in my tank. They are pretty small, biggest around 2cm but there are lots of them. Probably around 30. Is it harmful to the fishes that I will introduce later and most importantly what is the best way to remove them? I am thinking of taking the rock out and leaving it in fresh water? Good idea? Or reduce the salinity of the tank? But what effect does it have on the good bacteria?
Any advise would be much appreciated. Thanks