Automatic water changer  
The overflow device from inside the tank.  Here you can see the rigid siphon tube and the nylon strainer glued on the end (hot-melt glue).  I really didn't want any fry disappearing down there.

Unfortunately, the flash glare is exactly over the outlet of the drain tee.  You could see the relationship between the water level and the black overflow outlet.

The overflow device from inside the tank. Here you can see the rigid siphon tube and the nylon strainer glued on the end (hot-melt glue). I really didn't want any fry disappearing down there.

Unfortunately, the flash glare is exactly over the outlet of the drain tee. You could see the relationship between the water level and the black overflow outlet.


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