REEF/FISH AQUARIUM PESTS
Bristle Worms  
These worms are probably the most common reef tank pests out there. They are seen often by reef aquarists as reddish/purple/brown and sometimes orange. They look like a caterpillar and have fuzz or hair all over themselves and have many legs. Bristle worms can range from 1 cm to 12 inches. They come from live rock and sometimes with corals or other types of livestock. They mostly come from live rock deep inside. These worms can sometimes eat small fish at night and if hungry, they will eat corals.

Removing Bristle Worms  
To remove the worms, a simple trap can be made by using a container. 1 small hole big enough for the worm should be made in the container. Place some bait in the container and leave it in the tank for about 1 week and check every 1 or 2 days to see if you caught any bristle worms. Place the container in different places of the tank so that you remove most of the worms. If this doesn't work add a copperband butterflyfish, or some coral banded shrimp, or even a hawkfish and they will hunt them down.

Mantis Shrimp  
Mantis Shrimp are very annoying creatures that are imported in live rock and other sources of livestock. They can be very destructive eating small fish and destroying corals and tank decorations. They also make loud clicking noises in the tank usually when the lights are off. If you see one of these in your tank, remove it immediately as they will cause a lot of horrifying destruction to your corals and fish.

Removing Mantis Shrimp  
To remove the Mantis Shrimp, you can buy a reef trap from www.ffexpress.com and that should work. Other methods of removing the shrimp are to use containers and put hole in it and use some bait similar to the way you catch bristle worms. They usually come out at night so that would be a good time to try and capture it. Try using a net. If you don't catch it but see it go into the rock, take out that one rock and try to get it out from there, then just get rid of it.

Rock/Glass Anemones  
Rock and Glass anemones can be very troublesome if you have many of them in your tank. They reproduce very rapidly in reef tanks and should be taken out as soon as possible. It only takes one to start a whole colony. These little anemones can sting or even kill nearby corals and sometimes eat small fish that come nearby. These anemones are also called Aiptasia anemones. When there becomes too many of them, the tank is in for trouble; therefore, it is very important to notice and kill the first ones in the tank before they start to spread.

Removing Rock/Glass Anemones  
What you can do to remove these anemones are inject each one with very hot water and they will usually close up and die away. Using a hypodermic needle, inject calcium hydroxide (kalkwasser) of a highly concentrated solution directly into them. Keep doing this until they go away. You can use a small syringe to inject the hot water into each of them. Do it fast or they will retract quickly and they will not be harmed. If this does not work, there are certain fish that will eat them such as a copperband butterflyfish and hawkfish. 

Bubble Algae  
Bubble Algae is nice looking but can also become very troublesome when it spreads over all places of your tank. Try not to let any of them pop open because they release algae spores which cause more of them to grow in the tank. If this algae grows in your tank it also indicates you have good water quality. This algae can be bad when it starts to spread over other corals and suffocate them. The bubbles sometimes give a nice look to the aquarium but in large quantities it can be bad

 
Removing Bubble Algae  
All you need for removing bubble algae are some Mithrax (Emerald) crabs which you can also buy at ffexpress.com. These little crabs will find the bubble algae and eat them. Quite an interesting thing to watch when they eat the algae. These crabs are also reef safe and will not at all harm corals or polyps or anyone but the bubble algae. Once they find the algae they will eat it all. Other than bubble algae they will also eat long hair algae which can also be a nuisance in your tank. These crabs are the best solution to the large amounts of bubble algae.