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Interesting findings concerning strata temps (thermoclines) in a pond
A few years back I had posted about the vast differences in
temperatures in my 1+ acre pond, which is approx 21/22 feet deep. Even with a good fountian putting out 6,000 + GPH of water and pulling the water from 6 feet under the surface, it really did not effect the water below that level to any degree......Granted water that is deep has little to no oxygen level so its irrevalent in regards to holding fish, but it still plays an important part of contributingto turbid / alge laden waters. Our outside temps are in the upper 30's to lower 40's for the most part. My ponds water temp is as follows.... surface to 4 feet---53 deg 7 feet to 4 feet-----54 deg 15 feet to 7 feet---57 deg bottom to 15 feet--63 deg. Now in the new pond which is approx 13-15 feet deep with no fountain but using aeration from submerged aeration pads on the ponds bottom the temps a surface to 4 feet 56 deg 7 feet to 4 foot...56 deg 10 feet to 7 feet--58 deg bottom to 10 feet....58 deg The water with aeratin is much more uniform, so there fore its being circulated a lot better. I wuld imagine fish are better abole to utilize water that is deeper inthis aerated pond as compared to the other pond with a fountain a its only source of aeration. The aerated pond has water temps without as much variation, so evidently there is more of a mix or turnover of the water with aeration as compared to a fountain. In summer these numbers reverse with the warmer water on top, so its safe to say thje pond with submerged aeration will remain cooler even though its shallower, and provide much more useable water depth for the fish to use. The submerged aeration cost a bait more to buy, but its easy to install and clean.......I do not think its any mor expensive to operate as both draw amperage that is very close. Over time, however the submerged aeration is more than likely to produce much morew satisfactory results and better water quality than a fountain will. Now if yu have to buy a factory made fountain then your in the same ballpark price wise with either device. Unfortunately most folks go with a fountain over submerged aeration purely for aesthetics.......certainly nothing nice about apond with bubbles riseing up as compared to a illuminated fountain shooting water 30 feet into the air....but that lowly aerator is so much more beneficial overall even if no fish is kept. With an aerator you can always add a cheaper lesser output fountain for your viewing pleasure if you just have to have a fountain. Up unti lI checked the numebers with the fountain / vrs / aerator, I was going to but one of those propeller aerators, which also pull up water form deeper sections, but they are limited to how deep they can pull from so I am glad I ran some numbers on temps for now, and more than likely will just add more submerged mats to the other ponds and forego any additional fountain or propeller devices. HOpefully last year wa smy last at battling any algae blooms, as my water was great. I may even be able to reduce my potassium Permangante treatments to one dose instead of the customary two per year. No reason the info I gained here in regards to aeration / vers fountains etc would not apply to a liner type pond. Sure would like to hear others opinions on it though before I make any definate conclusions. Another thing I may fool with this year is taking actual water samples and seeing exactly what propponents rise and when they rise...spring, summer fall , etc.....Ponds are much to large to adjust parameters, but I can reduce nitrates and phosphorus with Potassium Permanganate. Also oging to be interesting comparing two older established ponds with a new pond in regards to water parameters. All are in same soil, filled from same sources, same exposure to sun......only differences is depth and age. ------- I forgot more about ponds and koi than I'll ever know! |
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