Red Slime Algae Takeover!!

I have a lot of red slime algae in my tank, my clean up crew eats all the other mosses.
My tank is right next to a window so I think that's why, however my mom is convinced that's not the cause and we should repeatedly rip apart the tank and start over. Which is not good for our fish and seriously risks the life of my mandarin goby and his food supply.

What causes red slime algea?
Any tips?

65 gallon tank
High salinity (working on taking this down)
Other than that we have good water.

Fish:
Two clowns
One royal gramma
One blue spot puffer
One mandarin goby

Other creatures:
Two pin cushion sea urchins
One sickly nem (probably due to prolonged high salinity)
Five tiny hermit crabs
Three sexy shrimp

Nothing seems to eat the red slime algae except the sea urchins but they only eat little bits. Please help.

 

It sounds like cyanobacteria. You can scoop it out of the tank. It forms a web in the sand. It you'd away on its own eventually. That puffer may not be a good match for your tank. They eat hermits,shrimp and urchins. 3 of your other tank inhabitants. Anemones need established aged tanks to live/thrive. If you are having cyanobacteria issues then your tank is probably recently set up.

 

Use phosban, do massive water changes, seriously limit your feeding and buy a skimmer

 

What's good water?
What are your water parameters? More importantly, what are your Nitrates and Phosphates at?

Essentially, at this point you should not find something to Band-Aid the situation.
You need to look into the underlying issue and fix it that way.

 

had a bit of cyano in my tank when it first started up. I just kept cleaning it off and BAM it was gone one day. shrug. now I have gorgeous coraline algae in both of my tanks that makes me happy lol.

as other have said- monitor water parameters, water changes, and clean up