I think the answer depends on what your substrate is...if you have gravel, then you definitely need to vacuum. I have EcoComplete and live plants (mostly Anubias). I have seven cories which snuffle around looking for uneaten food. Whatever poop is not picked up by the filters just becomes part of the substrate....I've not vacuumed even once since putting in the EcoComplete several years ago, and my water is unbelievably clean, fish seem happy, and live long, long lives.
Maintenance consists of changing water (20%) every week or two, and squeezing out the sponges at that time.....nothing more, ever.