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DIY Fish Observation Tower

Build an observation tower for your koi pond! Cut four rectangular pieces of glass and two thick squares of glass. Cut several large holes near the bottom of each rectangle below the water line and sand the edges of the entry holes. Use aquarium silicone to glue the rectangular glass into a box, glue the box onto a square of glass and place the fish tower in your pond. Rest the top square of glass on the tower without glue for easy cleaning as needed, tie an empty plastic bottle to a vacuum hose and use the vacuum hose to remove the air from the tower.

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