Algae and plants compete for the same thing: light and nutrients. A tank packed with fast-growing plants tends to starve algae out before it gets a foothold, which is why "add more plants" is often better advice than any algae treatment on the shelf.
Hornwort
Hornwort is one of the fastest nutrient sponges in the hobby. Left floating, it also shades the water column, which helps limit the light available for algae to use in the first place. See our Hornwort Care Guide for planting options.
Water Wisteria
Water Wisteria's rapid growth means it pulls nitrogen and other nutrients out of the water column quickly, leaving less for algae to use. It's also easy to trim back hard without setting the plant back much, so you can keep it working at full speed. Full details are in our Hygrophila Care Guide.
Vallisneria
Vallisneria's dense root system and steady leaf growth make it a reliable long-term nutrient competitor, especially useful in tanks with a heavier fish load where excess waste would otherwise feed algae blooms.
Rotala Rotundifolia
Under decent light, Rotala grows fast enough to out-compete algae for nutrients while also giving you a colorful stem hedge. It needs more light and nutrients than the others on this list to really perform, but in a higher-tech tank it's one of the most effective growers around.
A Good Starting Point
If you're dealing with an algae problem right now, Water Wisteria is the fastest way to start pulling nutrients out of the water — it's inexpensive, grows quickly with almost no demands, and gives you visible results within a couple of weeks.
