There is not a lot of algae in our tank to complain about.The water temp is perfect for Bison,he swims around happily.He seems to like the zeolite bag's cloth and nowadays his sleeping on top of the tank and not on the palnt's mould anymore.Bought some new tubifex and he is liking the combination of food that he is getting.The bubble nest is growing rapidly, but is is mostly surronded by the leaves of the plant.