Fish Being Different.

[electropunk06]

hi just got back from a weekend away and some of my fish are just hovering in place and staying still (still waving fins but just sitting there). not sure if ive not noticed it befor but fairly sure this is new?
all my corys and platys seem perfect but 2-4 danios and 2 dwarf gourammis are very inactive. they are fine when being fed and look perfect just wondering what it could be?

 

[ZoddyZod]

tried testing your water?

 

[electropunk06]

not yet im getting a test kit tommorow so i can update you then.
they all ok now but they did first thing this morning ive done a 50% water change so that might have cheered them up.
thanks