You are the first to build it so far. I'm not experienced with aquaponics so it would really be cool to see how it works for you. Have you done Hydroponics before? I didn't put it in my video this time but make sure you wash the hydroton rocks as they can cloudy up your water. I usually put them in a strainer and give them a good wash.
Look how my water got dirty here at around 1:30 min into this video.
I think thats what happened to you.
Great job though and love the bell siphon at the bottom!
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