Hello, my patio pond recently bloomed with algae, and I was wondering what algae eaters to get. The pond is not heated, and can get as low as 49. It is stocked with 5 Rosy Barbs, and potentially 2 Cory Catfish. The Pond’s plants are Anacharis, and Variegated Water Lily. I want a fish that would eat the weird stringy algae in my pond. The pond holds 42 gallons, but with the plants and the pot, probably 35. I do weekly water changes on it. I would also like (if possible) for it to be native to the US, but not influence my water changing schedule to biweekly. Any thoughts?