Hi, we have recent issues with algae outbreak.
Tank is planted, low-tech established setup with 6 Discus, 10 Otocinclus, 7 Corys and 2 Pleco.
Tank is established since 9 months and all was well till we skipped the regular bi-weekly cleanup, so problem was definitely related to un-eaten Discus food (ground beef harts).
Here attached are the pictures of the algae; looking at all the articles I am not really sure if this is actually a brown algae; looks darker (almost black) than pictures of brown algae I seen in the articles.
They are totally choking Java Moss (which was growing really well before) and also Anubis are really effected!
When trying to remove them by hand from Anubia leaves they are pretty hard (almost impossible) to get off; algae is stuck very strong to the leaves.
We have since tried to help by daily 25% water changes, but seems algae keeps winning and killing other plants.
Could someone help with few questions:
1) Are those algae on the photos actually brown algae?
2) Other than regular water changes and removing all un-eaten food what would be other things to help?
3) At the moment we run 12h daily of full spectrum LED lights which plants seem to like; would reducing or increasing the light intensity or duration help suppress the brown algae?
4) There is no CO2 added to the tank, but have been adding some seachem excell to help the plants; should I increase or reduce or stop using?
Would really like to find a way to bring the tank back to equilibrium without taking out the decor and cleaning it outside of tank.