Quote (expelle @ Dec 31 2009 11:27pm)
how can i find this out do i have to take a sakple of water somewhere?
No, all you need is to go to a local pet store.
Ask the person at the desk or any of the people roaming around for a pH test kit.
They are little strips that you dip in the water and then they change color, and there is a chart that show which colors are which.
Usually the colors are based on a scale from 1-10 - and they represent the acidity or the base of the water.
around 7 is what you are looking for, for your fish tank, although if it is salt water it may be lower (i think?)
good luck