first things first i have never had fish yes gold fish but never anything else or a complete fish tank with filter pump heater the whole works i am probably clueless and possibly over reacting that out of the way i recently purchased a 12 gallon fish tank prepped it with aqua safe and safe start rinsed the gravel let the water heat to 25 C ( thats 80 F ) and left it sit for a full day before introducing the fish namely a red betta 3 sword tails 6 guppies ( 2 male and 4 female ) and two wag tail platy's ( gold ) one of the platy's is the reason i signed up and why i am some what worried he seems to be only interested in hovering just below the water surface for so far i can see he doesnt seem to be gasping for breath the moment i take the cap off he darts around and when he stops floating around he seems to be livley enough and is interested in food ( prefers to eat alone though ) am i freaking out for nothing ? and is this perfectly normal behavior for a platy or am i better of isolating him ? and will he survive going from a tank with regulated warm water and a pump to one thats not ?