Help water problem

[mohammadali]

Hello my RSM250 full of water been running for almost 1 month with fish and coral in it no LS but few pounds of LR in it

past 1 week on the glass it gets green algae and cleaned and after 1 or 2 hours the glass got algae on it again and again , now the whole tank is full of algae
ill do 10g water change

salinity 1.25
ph 8.2 or 8.3
nitrate 0
ammonia 0
nitrite 0

Fish and corals seems to be ok

the water isnt tap water its from a 5 or 7 stage RO/DI filter