Success with tap water

[Dash]

I’ve never had algae issues until I started feeding more and using Reef Chili this year to get some colour into my coral. The colour definitely improved but now I have this one little clump of hair algae at the tip of my tallest rock (you can see it in the photo of my mandarin). I just need to find the time to scrape it off. Otherwise I think it’s pretty clean.
I have a ball of chaeto in my sump fuge and I think this helps. My previous 75 gal tank was sumpless & my old hang on skimmer was not great so I’d have the odd patches of cyano now and then. Nothing serious though.

Yeah, just tap water with Prime. I don’t have rodi set up.