so i had a diamond goby for 6 months he was doing great. 2 weeks ago he was being attacked by my blue tang. the tang is no longer in my tank. since then i had my goby in a basket recoverying. put him back in over a week ago and sunday found him on my floor jumped out of my tank. so later that day i went to my lfs and got another one. he was doing good all day found a nice spot to call his home. instantly started cleaning after his drip. and this morning i found him on the ground jumpes out of the tank . so that 2 in 2 days. all parameters are perfect. all other fish and inverts are doing fine no problems. any ideas