Physics for a Refugium: Help Needed
I set up a 5g refugium for my 20g tank. The fuge isn't drilled, and I don't have an overflow box.
For right now I have the fuge linked to the main tank by 2 reverse flowing syphon tubes. When I do water top offs in the main tank, the water level in the fuge rises to the same level. This shows that the tubes are passing water.
My question is are the tubes actively moving water constantly, or only when the level changes in one tank? I don't know if the tubes are still acting as they did when I first started their flow. In other words are the tubes still acting as reverse flowing syphons, or are they just stagnant until I do water changes?
This is confusing to me, but maybe clear to some of you, thanks for any help.