These are much tougher to remove in many cases than algae
About everykind there is that will grow in a tank.
Came in on purpose, or on a plant, airborn etc.
Grow the plants-that's the goal to begin with.
Enough to figure out why it's there.
Have not been pissed in many years.
Excess nutrients are not the issue 90% of the time FYI, plants are limited more often and then they get algae.
I have high NO3/PO4, no algae.