I have a 10 us gallon tank with 4 lyretail guppies and 2 otocinclusis. I feed the guppies small amounts at a time but they dont eat it quick enough before it goes to the bottom so there’s a lot of waste and algae on the bottom of my tank. My ottos don’t seem to go to the bottom at all one likes to stay behind the filter and the other stays on the walls or the cords in the tank. What type of algae or bottom feeder should I get to fix this problem??