Hello Rod. Im glad to hear that things are going well. I also recommend the Eheim auto feeder as that is what I use. You can program it for four feedings per day while you are out. As far as the water change goes, you saw how many I had in one tank and I do a 90% water change every day. The fish do not get stressed at all and actually seem to enjoy it. As others have mentioned, everyone has a different regimine for water changes but one larger change as upposed to two small might be better.
Bob