Pond Boss Forums AERATION Systems questions Aeration confusion

If you put the deepest diffuser on the bottom at 7 foot...that's 3.5 psi.

One diffuser will add about 1/2 psi.

That totals 4 psi without the pressure drop from the line. Use the following calculator to do the math for you (about 1/4 of the way down the page {Online Compressed Air Pipeline Pressure Drop Calculator - Imperial Units} using 4 psi, 50 foot of 1/2" line, putting out 3.5 CFM which is about right for your pump at 4 psi)...

https://www.engineeringtoolbox.com/pressure-drop-compressed-air-pipes-d_852.html

You get an added 2.4 psi that totals 6.4 psi working back pressure. That takes it off the pump chart and that is only using the 50 foot to the pond. That pump is too small for what your wanting to do.

Even if you were to use 5/8" line...it puts the back pressure at it is still off the curve...



One 9" diffuser is too few for a 1.4 acre pond, anyhow.

Check out this thread that I participated in today. The OP has very similar questions. It has a bunch of links in it that will give you a lot of direction...

https://forums.pondboss.com/ubbthreads.php?ubb=showflat&Number=524869#Post524869

My off-the-cuff guess is that you need a 1/2 hp (maybe a 1/4hp) rotary vane pump or an equivalent piston pump (or a half a dozen of the Fujimac 150's). Read through some the post links in that thread and get back to us with more questions. Be glad to help.

Welcome to the club BTW!