Yes, I suggest a more aggressive approach starting with stirring your bottom substrate or you will start building nitrates. I usually do this with my hands (not great for the hands) and place the siphon close to where I am stirring. The snails won't take care of it and they poop too. Also, it helps to blow off your rocks with a turkey baster to get as much waste water born (and sucked up with your siphon or exiting to your filter) as you can.Should I be a little more invasive?