ive just had a guppy die aswell :( it was always swimming at the top and i noticed it went paler than the other one,is there a reason they stay at the top then?
i have no live plants in my tank,i know the light is essential for them but as i have none should there be a certain amount of time that the light should be on or is it simply just for show?? and is it best on or off through the night?