Emerald crabs do eat bubble algae. I have personally experienced this in my own aquarium. I had a problem with bubble algae taking over my tank, and I tried various methods to get rid of it. Nothing seemed to work until I introduced an emerald crab into the tank.
I watched as the emerald crab went straight for the bubble algae, picking at it and eating it. It was amazing to see how quickly the crab was able to control the outbreak. Within a few weeks, the bubble algae was virtually gone.
I was really impressed with the efficiency of the emerald crab in eating the bubble algae. It seemed to have a preference for the bubble algae over other types of algae in the tank. While it did eat some other types of algae as well, it seemed to focus primarily on the bubble algae.
One thing to note is that emerald crabs can be a bit territorial, so it’s best to only have one in your tank. They can be aggressive towards other crabs and may even attack small fish if they feel threatened. So, it’s important to keep an eye on their behavior and make sure they are not causing any harm to other tank inhabitants.
In addition to bubble algae, emerald crabs are also great at eating hair algae. This is another common problem in aquariums, and the emerald crab can help keep it under control. They will pick at the hair algae, breaking it down and consuming it.
I highly recommend adding an emerald crab to your aquarium if you are dealing with a bubble algae problem. They are excellent scavengers and algae eaters, and they can really help to clean up excessive algae outbreaks. Just make sure to keep an eye on their behavior and ensure they are not causing any issues with other tank inhabitants.