So here is the freshwater dirt-planted 40 gallon breeder tank approaching the end of the first year in operation. I couldn’t be happier…well if the fish would quit eating all the plants, that’d be great. But other than that. 😀
This type of setup is known as a “Walstad method tank” as it uses a dirt substrate capped with gravel rather than a complex system of filtration. In this method, all of the filtration is done with the plants absorbing the stuff that the fish leave off, giving back oxygen into the water.
In the “pure” method, that is all that is done other than water top offs for evaporation.