More on the siphon

A lot of people on youtube, have a toilet cistern flushing unit to flood their grow beds, I was thinking of doing the same but came to the conclusion that a siphon would be superior as there are no moving parts, no seals or washers to replace and no way for this part of the system to "not function" as it relies solely on gravity alone, unless of course gravity just disappears. We have the PVC pipe about 1 foot long inside the tank, so the siphon drops about 350lts and then automatically resets itself for the next siphon. As you can see my nice tea coloured water from the Loddon River is just about half way up the tank, it will drop about half way before it resets, which is as long as the pipe inside the tank, as I mentioned earlier.