This discussion begs a number of questions for me, a total novice, especially as it relates to previous posting I have read about the importance of aeration. On the surface (pardon the pun) aeration sounds like a no brainer...size the system correctly, which I understand to mean the ability of the system to turn the water volume of the pond over once in a 24 hour period (or slightly oversize the system to allow for some variance) and run it 24/7.
But this discussion, specifically as it relates to photosynthesis of blooms of various algae (which I understand from these forums is an all-important part of the food chain), indicates that aeration may actually interupt the development of blooms. Bill states: "Some plankonic species are 'okay' with moving water. However most prefer somewhat calmer conditions." And Amanda says, "Water treatment plants, for example, are aerated to the max since the goal is nutrient reduction."
My take away from this discussion is that I REALLY NEED TO PAY ATTENTION to the effects of aeration on my little body of water. My original goal was 1. to protect my fish from low DO and 2. To minimize the buildup of muck from leaf and fish waste.
But from this discussion, I am beginning to see that single-mindedly pursuing those objectives through 24/7 aeration might inadvertently cause problems in other areas.
Sounds like more of a balancing act than I first thought. So, if I've learned something it goes like this:
1. Check water clarity...if it's more than 18 - 20 inches I may not have enough algae. Might indicate I need to slow down on aeration schedule
2. Measure water temps at bottom and top...if within 3 - 4 degrees (or better) then aeration is preventing stratification and is an indication of decent DO levels (though not to be confused with the accuracy of an actual DO meter)
3. May be better to aerate at night into morning sunrise if on a 12 on / 12 off schedule, allowing sunshine to spur bloom during daylight hours.
4. A body of water is a living, breathing, creature full of living, breathing creatures. Get to know it like a friend, build a relationship, know when it's happy and when it's sad, then jump on the forum and find out what to do about it.
