Need some answers on water changes?

[lovenotthrowdiscus]

hey there,
a friend and i were discussing the other day about water changes,
we both had 4ft tanks at the time.....

i was telling him that i have purchased a 6ft tank so i can finally get discus
and i was telling him how important water changes are for discus to be healthly........

he told me that the whole time he had a community tank he probably changed the water once...and he swears none of his fish ever died.
how is this possible????

i know we change water to reduce polutants and keep the water fresh for the fish but are there any other main reasons we do it???

im not a know all,i just need to explain it to my friend hehe
so it sounds like i semi know what im talking about lol

thanks guys

[lovenotthrowdiscus]

sorry i just read the post with all the answers
below mine a few.

delete delete delete

[Nathan]

i knew there was a sticky about it somehwere just couldnt find it. anyway heres the link even though youve read through it!

http://www.discusforums.com/forum/viewtopic.php?t=6859

nathan

[lovenotthrowdiscus]

haha thanks man