Fertilizer Injection from Buried Tank: Siphon vs. Pump for 1:1 Ratio

User has a buried 55-gallon tank receiving daily diluted fish waste. Wants ~1:1 mix with hose water for garden irrigation, maintaining sprinkler pressure, without a pump if possible. Mazzei and EZ-Flo injectors only achieve 1:12 ratio and cut pressure 50%.

Siphon Limitations

Tony: "I would be hard pressed to come up with a definitive answer... except for a pump because the tank is buried below the main line." Siphon lines from a buried tank to the mainline won't generate enough suction for 1:1 ratio at pressure.

Better Solutions

1. Raise the tank above ground with a bottom valve/pipe assembly tied to irrigation supply. Atmospheric pressure on the tank water pushes it into the line with minimal pressure loss.
2. Mariotte Siphon (constant head device) on an above-ground tank—provides steady flow rate regardless of tank level. "Google search Mariotte Siphon for principles."

Gravity feed from an elevated tank is the only passive way to approach 1:1 ratio at pressure. A small dirty-water pump ($40-60) is the practical alternative if elevation isn't feasible.