there is a small chance of getting mosquito in your fish tank. If you should have this problem, here is your solution.
Step 1: About mosquito lava
Mosquito larva are baby mosquitos. Mosquitos start out as an egg and when they hatch they turn into a larva. After a few days they turn to pupa. Then they turn to mosquitos. Mosquitos spread many diseases so they are not very good to have in your house.
Step 2: When you know you have a problem
my tank was almost empty. Just one algae eater remained. At first I thought I had lots of baby algae eaters on my hands... I soon realized they were mosquito larva.
Step 3: Solving the problem...
The goal is to save the existing fish and eliminate the larva. Using an old trick that we use on our farm in our water trough... we decided to introduce a mosquito assassin.
Step 4: And away we go
release the fish into the tank. The fish went absolutely crazy. By our estimates he ate all 30 or so larva in about 2 minutes.