any else can help me...
firstly i setup new tank...
but i saw there water look problem...
any else can give any idea to do something...
coz i d'not use skimmer....
help me..
coz i put the coral pass away...

hello there. Could you please give more details as to what you mean by "water look problem"? Could you also give more details about your tank? As in size, what you have/had in it and how long have you had your marine system. Skimmers are necessary for removing organic compounds from your tank to take the strain off your bio filters. There are some who believe that they are not necessary if your tank is small and if you do proper water changes.

So more info will be needed before anyone here can help you with your issues.