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- Aug 28, 2019
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Earlier this year I had a lot of fuzzy/thick red algae on most of my rock and aquarium wall. I was able to remove from the wall (physically removed) and get a lot off the rocks (turbo snails), but it remained as a thin layer that I couldn't remove and the snails didn't seem to want to eat. The snails then all died off pretty quickly.
Water parameters were all fine and not much nutrient added to tank -- 120G tank only had 3 small fish that I fed lightly. I also dosed with Vibrant bacteria, but don't know if that helped or not.
I moved the fish to another tank, and then did a 9 week total blackout. (No coral, fish, or inverts in tank.)
I just uncovered and found that the algae is still there. It's perhaps a bit less dense, but it's still on all rock to varying degrees. I tried to scrub off, thinking perhaps it was dead/weak, but it doesn't come off the rocks. See photos.
I had expected the algae to die off without any light.
Is this unusual for algae to survive so long without light?
Any advice for next steps? (I've been told to try hydrogen peroxide dosing, but I'm wondering if there are other things to try too.)
Water parameters were all fine and not much nutrient added to tank -- 120G tank only had 3 small fish that I fed lightly. I also dosed with Vibrant bacteria, but don't know if that helped or not.
I moved the fish to another tank, and then did a 9 week total blackout. (No coral, fish, or inverts in tank.)
I just uncovered and found that the algae is still there. It's perhaps a bit less dense, but it's still on all rock to varying degrees. I tried to scrub off, thinking perhaps it was dead/weak, but it doesn't come off the rocks. See photos.
I had expected the algae to die off without any light.
Is this unusual for algae to survive so long without light?
Any advice for next steps? (I've been told to try hydrogen peroxide dosing, but I'm wondering if there are other things to try too.)