Well I have fish that constantly agitate the sand. Sometimes there are small pockets that you can tell are going stagnant so i will stir those areas up with my fingers before a water change. You definitely cannot siphon right off of or into your substrate when you are using sand. I siphon water from the middle and top portions of the tank.
If I had fish that didn't stir up the sand I would just rake my fingers through it before a water change. With a small tank like that it should be no big deal.
If I had fish that didn't stir up the sand I would just rake my fingers through it before a water change. With a small tank like that it should be no big deal.
