Folks, I wanted to hear your inputs. I am starting out with a newly planted 10 gallon aquarium a week and half ago using the Walstad's method. I started with no emergent plants and it's not heavily planted either. I started to see the onslaught of green algae and I know it will sooner take over the tank if I don't do anything. So I added duckweeds but it keep getting stuck under the power filter and is not multiplying either. I have a aqua-clear 30 on the 10 gallon. Maybe it's too powerful but I set the filter to the lowest setting since it could be use from 10 to 30 gallon aquarium. I just have the sponge filter and the biomass cylinders inside(not mentioned in walstad's book). I also bought some hornwort as emergent plants to soak up the nutrient. Walstad recommend snails as well so I went to the local pet store and grabbed some of the snails they have. They gladly gave me the pest snails. I notice three pest snails. One looks like the trumpet snail with ice-cream cone shaped shell about half inch in length. I don't know any snail of that shape other then trumpet snail. I put them in my aquarium and they slowly dug into the substrate so that's a good indication it's a trumpet snail. Walstad recommends the malaysian one. Not sure which one my is. I also notice a snail that looks like a football pointy on both end and is dark colored about quarter inch in size. Looking online it looks like the pond snail. This I threw away since they are known to each plants. I also see a quarter inch size snail with the shape of a ram and dark colored as well. I assume that they are ramshorn snail. The question to you guys is whether I should introduce the snail in the aquarium. It's tiny one but online, it say that they will eat plants as well but other places say they are nice to have in the aquarium. So what have your experiences like? Also the snail look exactly like the first picture on wikipedia ramshorn snail. Thanks for your input.