if you think you overfeed fast them for a day or so on weekends, or just feed everyother day, most fish dont need a 4 course meal 3x a day so they most certainly wont starve to death! A hungry fish is a healthy fish!
If not then atleast vac ur tank bi weekly and keep params noted! Its funny to me how people will do anything to avoid vaccing like adding salt or bottled medicines! Just old fashion suction can prevent many deaths alone! And its easy when changing the water to do a 3 min vac session!
#1 S. Vettel