Well where to begin? I've started a 10 gallon aquarium for my girlfriend. I know it's little and difficult but anyway we've been having bad luck with fish this far. Started it a month and a half ago and have had 5 salt water mollies in it. Took two out after 3 weeks and put in two common clownfish. The clowns died 3 days later and only ate the first night. I think the mollies caused a lot of stress. 5 days later after letting lifeguard sit in tank. We got two new clowns and a sixline wrasse. The next day the wrasse dies. He seemed to be sick from the beginning even at the lfs. He was sluggish and after being put in our tank he stayed at the surface on his side or laid on the sand on his side. He died today right before our eyes. He was laying down then took off like a rocket and then gently floated down to his sandy grave. I got another one today from the fish store he is doing wonderfully. Eating and really active. Now I look at my emerald crab not moving looking dead as a door nail. He fought with an asreus snail today. And now he's dead what's the deal. Sorry for the long post I thought details help.