Are there any shrimp and fish safe algaecides that actually work? Maybe a US product I could find the equivalent of here, I have hair algae and nothing I do will stop it, lowered lights and upped co2, religious water changes etc

I've used algaecide and will share my experience. I had terrible diatoms and green hair (thread) algae. Most likely because the tank was newly setup - only about 3-4 weeks. The inhabitants were 10 amanos, 10 tetras and 7 raspboras.

I applied algaecide Dr Tank Algae Control Zym. Yo have to google it - its a Chinese product. I'd likely be criticized for it - but this is my experience.

Applied according to dose - the fishes were fine - all survived. But I lost one Amano - would have lost 3 if I hadn't remove them and placed into another quarantine tank. The two recovered so I placed them back.

The algaecide was very effective though, because by day 3, all the thread algae and diatoms were all gone. The cost was one shrimp.

Right I see, thanks I'll look it up.

Just overdose excel by 2-3x every day for a couple weeks.
I have been doing in my betta tanks to beat staghorn and thread algae and no loses at all.
At the added benefit of greener growth.