hi everyone. my platy won't come out from behind the filter. the water in the tank is clean and i use a siphon to empty the waste and do water changes. she is a orange female platy and i don't know what is wrong. i have a 5 gallon tank with an overhead light. she doesn't even come out when i feed her and the other guppy in the tank. i am thinking about buying another female platy for her to socialize and play with so she won't be hiding. is this a good idea or not? if i do, should i also buy another guppy for my guppy to have a friend? she come out once every 3 days when i am not looking or near the tank and when i come in she swims away. please help.