algae

[Tangman]

Welcome to Canreef !
Like Marie and Der_Iron_Chef said the algae bloom is part of the ageing/ cycle process and will pass , but if you are using tap water with high nitrates, phosphates or high total dissolved solids (TDS) the bloom will last a long time or even never end, most people will recommend getting a RO/DI filter and do a lot more research.
Good luck and happy reef keeping !