Dark green spots on glass

[Rexxxer]

I'd say algae and bacterial growth, phosphates alittle high? TDS bit on the high side? What kind of water are you using?

What is tds?

 

[Reefing Madness]

Total Dissolved Solids

Acceptable TDS

I tested my tank with a TDS meter and came up with a 54. What is the acceptiable range and how does TDS affect the aquarium.

www.reef2reef.com

 

[phish18jed]

It’s gotta start somewhere! I had it first on my back glass then started getting on everywhere. If your rocks have algae it takes longer for the coralline to grow.

I totally agree but i don't get it on my glass but it's on my rocks and it's truly hard af to get off. It gets in every nook and cranny and it recently started to cover one of my corals. I've tried lowering the feeding amount, lighting is on for 5 hours for now (to get to get rid of it but no luck. I'll where it came from nor how to get rid of it...can anyone help? It's not coralline algae but it is some kind of algae...like I said earlier, it is like scraping barnacles off of a shell but flat