Question
Hi, I have a 55 gallon tank buried just underground that will receive diluted fish waste water daily.

I simply want to water my garden with about a 1:1 ratio of tank water/hose water.

My real issue at the moment is figuring out how to siphon the water out of the buried drum (without a pump) at a near 1:1 ratio and maintain near faucet pressure for the sprinkler. I haven't seen any non-pumped solutions that achieve more than 1:12 water/fertilizer pickup ratio (there may be some out there), and some end up cutting pressure by 50%, which won't use up my fish waste water quickly enough or maintain enough pressure for my sprinkler to shoot the distance it needs to shoot. mazzei-injector.com and ezflofertilizing.com show the basic idea. I could use a dirty-water pump from harbor freight ($40-$60) but I'd hate to have to run an electric pump every time I water.

Any ideas on how achieve near 1:1 siphon pickup ratio while maintaining near-input pressure?

Answer
Hi Vince

I would be hard pressed to come up with a definitive answer for your situation, except for a pump because the tank is buried below the main line.  You may want to try multiple siphon lines from your tank to multiple connection points on the irrigation main line which would increase the ratio but at what cost to dynamic pressure I couldn't be sure.

Conversely, if you considered installing the tank above ground and outfitted it with a valve & pipe assembly at the bottom of tank, then tied it to the irrigation supply, you may get the desired results thanks to the force of atmospheric pressure on the fish water and lose almost no working pressure.  Or a steady flow of fish water could be achieved by creating a "Mariotte Siphon" assembly out of your above ground tank.  Google search Mariotte Siphon for a number of links on the principles of it's functionality and usefulness.

Good Luck.

Tony