Short Video Of My Marble Hatchets

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Here's a short video of my marble hatchets. I've recently installed a tetratec ex1200 and since then they have livened up so much. On the clip it shows one of them swimming against the flow of the outlet pipe then letting himself go with the flow. They seem so much happier since i've installed it.

http/www.youtube.com/watch?v=X5LCaMYmAro

(I hope there happy and not just stressed with the water flow!!)