Pond Boss Forums AERATION Systems questions Diffuser depth and other Q's 38 ft deep 3 ac pond

Dear fellow PB forum readers,

I'm hoping to solicit opinions on diffuse placement in my cousins 3 acre highly stratified (same green-brown color year-round, but spring fed) Puget Sound (doesn't freeze) 38 foot deep pond? There is lots of anaerobic organic material in the shallows, and a fair amount of rooted vegetation. She and the 9 other fellow cabin owners stick a few hundred catchable size rainbow trout every year. Sounds like there is little carryover of those fish from year to year.

I am assuming that at least 10 feet would be a minimum. I'm also assuming that more would be better, given to deepest point is 38 feet (although I don't yet have an idea of an underwater map.)

In addition to diffuser placement, we have to choose a system. I would tend towards the smaller AC Pondmeisters if 10 feet or under, but if deeper assume would have to go with something able to generate a higher pressure?

I'm also hoping that, given the mild climate, depth, and fact that it is spring fed, that we could get by with daytime aeration only. They are off-grid, and adding a battery bank may make it cost prohibitive

She has consulted with her local biologist (I assume extension agent) and is about to assess a macroinvertebrate species sampling as well as water chemistry and temperature profile analysis.

Thanks, folks, for any opinions!

Being off the grid, it will be hard. More so with the cloudy days.

I like to see a complete turnover of the pond volume of water between once and twice per 24 hr period.

But with it being that deep, I think that if the diffusers were placed at 20 to 24 feet that would be enough.

Talk to whomever is furnishing the diffusers with the system and ask them how many GPM of water each diffuser disk moves per hour of operation at 20-24 ft. water depth. That means that the compressor will be working at 12-14 psi. to supply air at that depth.

Not taking into account the water that is below the 24' depth, you will be trying to move a minimum of 11,731,000 gallons of water to 23,500,000 gallons of water per 24 hr period. Now, if you are only running the system during daylight hours, then you have to increase the gallons moved per hour to correspond to the hours of daylight. i.e. if there are 12 hr. of daylight, the system has to move that amount of water in 12 hr, not 24.