I’ve had my 20 gallon nano for around a year now I have 2 clowns 1 firefish 1 gramma my rock is covered with algae and i added the coraline in a bottle in October I started with live sand and dry rock and i haven’t seen any blooms in it I have 5 softies 4 lps 1 sps what is wrong I do weekly 20% water changes and I’ve had the problem for around 7 months what is wrong please help am I doing something wrong