Venturi needlewheel impeller water pump

[Northern_Loki]

I’m using a needlewheel pump, I do believe there is value here. I haven’t updated it recently but check out the following thread:

Airpumpless Sluckets

Here is an experimental set-up utilizing “slucket buckets” in a, more or less, DIY configuration. [image] Slucket buckets have sloped bottoms along with a bottom port allowing for improved drainage over conventional RDWC type set-ups. Water is injected from the bottom ports on each of the growth modules while water is removed from the bottom port at the reservoir. Return from each of the growth modules is via a 3 inch diameter pipe. Several valves comprise the pump manifold allowing the dir…

I have a couple of LDOs at this point and can measure O₂ saturation. I’ve seen some signs of supersaturation but I need to get some longer term data.

Some animated gifs of the sites in that thread:

Airpumpless Sluckets

Not easy to see the bubble size but here are the differences between plain h20, surfactant, and surfactant+nutes (sorry 'bout the color correction). Plain H20: [image] Surfactant added (Yucca): [image] Surfactant + Nutrients: [image] Surfactant + Nutrients (foam calming down about 15 minutes later): [image] Surfactant + Nutrients (zoom): [image]