- Joined
- Jan 14, 2018
- Messages
- 537
- Reaction score
- 313
Months ago I had a problem with green algae. I used 12% hydrogen peroxide on the rocks, added phosguard, and performed weekly water changes. It worked the green algae died and went away. My water parameters are okay and the store where I take my water to be tested stated that the phosphate levels were okay. I now notice that green is coming back on the rocks which mean the green algae may be trying to come back. My first question is why is it coming back if my water parameters are wonderful and what can I do to stop it? I do not want to add peroxide to the water in the aquarium because I do not want to harm my corals. What shoulld I do?