How do you clean a planted aquarium?

I have a tank that is heavily planted and lightly stocked. The bio balance is such that I can go months without changing the filter. I change the media 3-4 times a year but do weekly water changes. There are times when I go longer between w/c's without harm but know the plants and fish need the replenishment of trace elements.
 
I typically vacuum over the sand areas that I haven't planted yet.

I vacuum over the planted areas too- but just lightly- I don't do the thorough stir and clean that I do in the unplanted areas.
 
I have another question that kinda pertains to this. If you have a heavily planted aquarium (like the one I posted in this thread) would fish like plecos and corys have a hard time feeding from the bottom?
 
I have another question that kinda pertains to this. If you have a heavily planted aquarium (like the one I posted in this thread) would fish like plecos and corys have a hard time feeding from the bottom?

We made open space in the front middle part of tank and put algae wafer / shrimp pellet there and vacuum that open space only. Vacuum for this tank usually takes a minute. But we still do weekly water change of 40-50%.
 
This thread makes me feel a little better about my water changes now!! I am finding it harder to gravel vac the tank, so just end up swirling the gravel vac around to pick up as much as possible.
 
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