hello ej, welcome to the forum,if i were you i wouldnt add anymore fish as the tank you have is very small.You have guppies already, and the thing is, if you have 1 male + 2 females within 6 months you could have a 100 babies...the thing with small tanks is they're harder to keep the water conditions correct, which in turn could lead to problems...it sounds as if you are doing things correctly with the water changes etc;it also sounds as if you have got the fish bug?it wont be long before you have to ask mum to move the furniture around to fit in more tanks

id wait for a while, see how you get on and maybe mum will buy you another tank...if you liveed close to me id give you 1 of my spare 2fters...good luck n all the best and dont feel scared to ask any questions, we dont bite, well not often
