Sounds like a great spot! My lake is about the same size and not as deep, from my limited experience I'd say you have an interesting plan that should be started in stages to see what will work. It would be great to have a lake with every species in it but sometimes it's not practical and not sustainable...you'll find that one species will dominate and it might not be your favourite species if you know what I mean. For example, I've found that my original plan of having a bass lake changed into having a trout lake with spawning grounds like what you want. But I can pretty much guarantee that your hard work of spawning grounds building might be for nothing if the other predators in the lake gobble up the tasty fry - although it is possible for some species to get along and avoid each other in an ecosystem but youll have to experiment.

My lake only have a few little holes about 13 or so feet deep, most of it is 6 to 8 feet, Im in ontario canada, we had a very hot summer with 26 days over 80 degrees in july last year and august was just about as bad - some days were up to 90. The lake got very warm but my rainbows and brookies made it somehow - they found an area of refuge and I know for a fact that at the bottom the DO was very low...but they made it and they are getting big. I put rainbows and brookies in the lake, the rainbows are easy to catch and the brookies are more elusive...

On the spawning bed, my friend laid out about 6 inches of gravel about 20 feet wide and out 10 feet and put a garden hoses under the gravel coming from a well, we have videos of the brookies spawning and we have caught small brookies so it is working. Brookies spawn in the fall when the water is colder so it is easier for them to find a place to spawn - just make a little area and flush the silt and algae off it before the spawn so it'll help them out.

My advice would be that you should determine what your main predator and forage species should be and just go with that to start, insert the forage fish and then a couple or 3 years later put your predators in so they have an established forage base. Since you put in RES i think bass will be a good predator, the tigers might eat everything you put in there, if you put walleye in they won't eat the RES as easy as the perch...but if the perch over populate youll end up a like a stunted perch!

Many of us have made lots of mistakes and youll do it too - and regret it like us lol, but I guess it's part of the human condition. I wanted a bass lake, so I added Sunfish, while waiting for the sunfish to populate I added rainbows and brookies which I really like but now I have zillions of sunfish that the trout can't eat so I need something to take care of the sunfish - but that predator will ultimately eat my smaller trout and any trout that manage to spawn...see my conundrum? But while I'm trying to figure out what to do about the massive amounts of sunfish last week I'm in the boat fishing for trout and look down and see the first school of large mouth bass fry swimming by (thousands of them), 2 years ago we put about 3 LMB in that were about 3 inches long......and there you have it, my sunfish will be gobbled up, my LMB will grow rapidly and eventually eat any smaller trout, so from now on ill have to eat the large bass and I'll have to stock trout about 2 pounds and larger. good times!

On aerating in the summer, the first year i did it i aerated from the bottom all summer and had algae blooms like crazy, last year I didnt aerate, had a way hotter summer and the water quality was so much better all summer. If it gets as hot this year the only thing I will do is run a fountain at night, I wont aerate.

Cheers and good luck! Send pics!