Some pretty bad green algae, any chemical fixes?

[kingkapoor]

So my tank is around month 4. We got past a diatom stage which scraped off the glass easily. Now I have this green algae thats very hardly crusted on the glass. Any techniques to get rid of them?
My water parameters are near perfection with very little nitrates and Im using rodi water

 

[mcdrichj]

What are your phosphates at? Also what do you have for stock in the tank?

 

[kingkapoor]

Damsel and clownfish with around 4-5 hermit crabs and 2-3 snails. (15 gallon)

Dont have a tool to measure phosphates, would a 30% water change help with the algae?

 

[mcdrichj]

You can just make sure that you match per temp and salinity. How frequently do you change the water and how much?

 

[mcdrichj]

I would do a water change and take your rocks out and scrub them in the old tank water with a tooth brush get as much off as you can. Then put everything back in your tank. you can try Chemi-Pure Elite if you have a spot for a media (Its is carbon and ferric oxide with will remove phosphates). This could help if you have high nitrates. I have a 15 gal myself but I have a 10 gal sump and a skimmer. I had an outbreak when I didn't have a skimmer for a little bit. I got as much off the rocks as I could and started using chemi-pure elite and I noticed a big reduction. Every week I did a 20% water change until I got my skimmer back in the system then I was able to reduce my WC to 10% every week or 2 or 20% every 2 or 3 weeks. Now I only have a minimal amount of GHA. I hope that helps. Maybe look into a small skimmer if you can put it somewhere.

 

[Pdash]

This doesn't look particularly bad... just clean your glass...