Cheapest way to make siphon overflow for automatic waterchanges?

  • We are currently upgrading MFK. thanks! -neo
Pic of how it looks on my tank of marbled crayfish. Its a bit green in there, I put a bunch of green water with daphnia magnas for the crays to eat (they will get to them when the lights go off right now they are out of reach).

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I dont think this is going to work real well because of out gassing =/ The tubes slowly fill with bubbles that get bigger and bigger until they start joining together that can stop the flow.
 
Anyone use a small glass drill and poly tubing to make drilled tanks on the cheap?

For example: about 2/3 down on the height of the tank drill a 6mm hole 1/2 inch from the side. Form some 1/4" poly tubing into an "L" shape and press through hole. VOILA done?
 
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