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Introduction. Plastic fry traps and net breeders are often used to separate new fish fry until they are large enough to be released with other juveniles or adults. These containers have two main drawbacks. Larger fish in the main aquarium may prey on fry when containers with mesh bottoms are used, and fry must be removed when water changes are made since most containers are held in place at the surface of the aquarium. Instructions for constructing a floating fry trap follow. The supplies are easily obtainable and probably already in the home of most aquarists.
Tools and Supplies. Plastic silverware tray (6x10x2.5") -local discount store ~$0.75-1.50 each Plastic mesh screen -hardware store ~$3.00/yd. Styrofoam -hardware store or use old fish box Aquarium silicone sealant -pet shop or hardware store ~$4.00/tube Scissors Utility knife Pliers
Construction and modification. See photo below. Any size silverware tray may be used depending upon availability. Pliers may be used to break the plastic supports along each side of the tray to increase water flow through tray. Cut plastic mesh screen to fit opening on each side and overlap onto remaining plastic of tray. Attach screen to inside of tray using generous amount of silicone sealant. Styrofoam floats (approx. 0.5x0.5x5") are cut using the utility knife and attached along the upper edge of the outer sides with silicone sealant. Note: Styrofoam floats may be attached to all outer sides for increased stability. Allow 24 hours for silicone to cure and test by placing in aquarium. Locate the floater in a corner, out of the main water flow. If the floater wanders around the tank, drill a small hole in one side, pull a piece of airline tubing through the hole and knot to secure, then pull the tubing underneath the aquarium lid using the weight of the lid to hold the floater in place. Remember to release the floater when changing the water.
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