help with algae

I attached a picture of this stuff, its coming up everywhere, all over my live rocks. Some of it even has like a string holding a bubble. All my tests are fine. 55 gallon PH is at 8.3 Ammonia 0-0.25 Nitrite 0 & Nitrate 0, temp is at 77.5 Is it good or should I be worried? Thanks

hello everyone < i know im asking alot of questions and probably annoying everyone but im starting to get dark green algae on my glass and rocks, I use purple up to get coraline algae but is coraline algae green or purple, i scrape it off with a razor what can i do to stop this, its getting all...

Hey all, I have three saltwater tanks at home. a 90, a 40, and a 20 frag tank with no problems, I just set up a small 30 gallon with a 20 gallon refugium below three weeks ago. I bought 40 pounds live sand, 40 pounds of Bali live rock, I used 15 gallons of water from my 90 gallon and mixed the...