I need to skim the top of the water In my tank...I do not have a skimmer...Is there a way I can do this with something I might have at home...It looks like their Is a layer of dust on the top...and could be...we have been renovating a room downstairs and the dust was In the air...I forgot to cover the tank...plz don't growl me..as I am very new to this...I just want to clean It...I have 4 crabs and 4 snails In my 26gl tank.....help.



