If its still young it won't bloom well. I planted one in my parents yard and it took many years (6-7) years before it actually bloomed like it should. You may want to try fertilizing it next year starting in spring help give it a boost.
Yes, they can.
Dinoflagellate blooms
algae
Algal can cause "red tides". Specifically algal blooms.
The main ingredient in fertilizers that can cause algae blooms is phosphorus. When excess phosphorus enters bodies of water, it can promote the growth of algae, leading to harmful algal blooms. These blooms can disrupt aquatic ecosystems and deplete oxygen levels in the water, negatively impacting fish and other marine life.
anna
Red tide is produced when red algae is reproducing
Melt and you will have wet pants. That could be embarrassing.
An overabundance of nutrients and lack of predators. Growth of the plants or algae can, if not eaten, cause a bloom.
inertia
Some algae species in blooms produce toxins that can cause illnesses. Some of the toxins can be airborne during a bloom and people can get sick by inhaling the toxins.
springtime blooms of algae that live only in deep, persistent snowfields.