" a* Y$ l; v, k' U8 K9 _2 t+ ?9 IStarving new koi fish for three days is an attempt to acclimate them to their new environment. Just entering a new environment will make the fish more nervous and generally will not eat. So the newly bought koi will not be fed for the first three days, of course, some fish may need a week to adjust. The new koi carp can be raised in a finished product tank with good light transmittance and a powerful filtration system, can also be raised in a ground tank with a large occupied space and a large volume, and can also be raised in an ornamental round porcelain tank which saves space.