Bill Cody - well said on all posts. Algae's value is vastly underrated - it is at the bottom of most food chains, found in all types of water, captures more energy of the sun, and produces MOST of the earth's oxygen.
For all - Worthy of note is that many fish can easily survive destratification - especially in deeper waters. The small increase in temperature is not nearly as harmful as the lack of dissolved oxygen. An exception can be in shallower reservoirs, where there's more chance of greatly increasing the bottom temp. Note that there are some fish that can be harmed by a slight increase, so it's good to research what you have.
The best method of increasing levels of dissolved oxygen at lower depths is gentle circulation. I recommend the SolarBee - and not just because I sell them... they can circulate water in a reservoir from any desired depth (operator adjustable in the field) increasing DO both by surface renewal and via increased photosynthesis. They are solar-powered, so no need for electricity, operate from sunup to sundown, low maintenance, 25 year life span, and can be rented before being purchased.
Check out
www.SolarBee.com. Best Regards,
Michael
