Your fish still need a healthy environment so I wouldn't stop the water changes. Water changes provide clean healthy water for the fish not to mention they help keep most of your parameters more stable.
As far as feeding goes, fish in the wild graze and hunt for food all day. You should be feeding your fish at least twice a day, but only enough that they consume 90% of it within a few minutes(2 minutes not 10 minutes). I feed my fish three times a day, a few shrimp pellets and a few algae wafers in the am while the lights are out, then two meals after work of frozen and flake. Soon I will even be getting an auto feeder so they will get a few more mid day snacks.
Just try to keep your hands out of the water for awhile or spooking the fish too much by other actions.
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