advise needed for 3ft tank with cichlids & silver dollars

hi all,

need some advise here. is it necessary to add anti-chlorine for a tank with cichlids and silver dollars + some other smaller fishes? i have a 3ft tank with these 2 types of fishes and so far for the past 1-2 years they are doing fine w/o the anti-chlorine and both SDs and cichlids have spawned without adding salt, anti-chlorine etc - i basically use just tap water and some coral chips.

heard from some people that anti-chlorine should be added? is it really necessary?

thanks in advance