Tom Barr writes: This is what happens when the CO2 is bad for a bit. I can clean it out and all that, do many water changes, but it'll keep coming back unless... I up the CO2. In this case the gas tank ran out, so swapping a new tank fixed that.
2 days later. Trimmed, remove most of the algal biomass, CO2 is good. I sometimes add algaefix to polish off any left overs. Shrimp do not like it, but most survive. Alternatively, you can net them out for the treatment and then add back afterwards. Tank never got it again. I've fixed client hair algae tanks many times doing the same thing.
A few weeks later.
