A few weeks ago, I noticed the following things happening with my 5 gallon planted tank:
- Black hair/brush algae started showing up in my aquarium and growing on plant leaves
- A lot of anacharis, which had been enjoying good growth, died
- My red cherry shrimp started disappearing
I haven’t seen many pictures online of the kind of algae that I have. One website said that the black variety that I have is caused by low CO2 levels but they didn’t have photos, and I haven’t found other sources of information. The algae is firmly attached to plant leaves and doesn’t wipe or rub off.
I didn’t test my water when I first noticed this, but I did continue with my regular water change and did a few additional water changes too.
I got some otocinclus to eat the algae, but they wouldn’t touch it. Then I bought some Florida (American) flagfish. They eat it and have eaten most of it. Here’s some photos of the algae:
In some of the pictures, you can see some shrimp. That’s in older pictures. When I got the flagfish, there was one left, now they are all gone.
I’m still dealing with this and would appreciate any advice. Or if anyone can properly identify what type of algae I have. If it is a CO2 related problem, I’d have to think hard about getting CO2 equipment as I’d like to keep expenses low for my low-tech tank.