Help - Red Algae - Type and how to stop it

[intarsiabox]

Use a turkey baster to suck out as much as you can and do a water change. Increasing circulation in the tank prevents it from taking hold. You should also check your water parameters. Coraline makes a hard skin over the rocks and glass that can only be scraped off. If it is soft and can be sucked off the rocks easily it is cyano algae.