@FrankZ you wouldn't have a microscope to look at it, would you? With algae that is difficult to kill, I would like to get a good look under a microscope to ID it.
To me, it still looks like the cyano I've experienced in the past. I'm not sure what is in the commercial cyano-killers but I used erythromycin with good success. It does take a couple of days for it to go away.
Before going with anything extreme, I would try the following:
Sorry you're going through this.
To me, it still looks like the cyano I've experienced in the past. I'm not sure what is in the commercial cyano-killers but I used erythromycin with good success. It does take a couple of days for it to go away.
Before going with anything extreme, I would try the following:
- 90%+ water change, with substrate cleaning and then add quality activated carbon actively for a few days;
- Reset fertilizer;
- Erythomycin and black out for 2 days; and
- 90%+ water change, with substrate cleaning and switch activated carbon and leave for a week.
Sorry you're going through this.