1.) Bramble placed in the pond will provide shelter for the younger fish.
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I may have some by mid summer I can throw in. I will start with what I have now. Shrubs, but no thorns.
2.) Are you sure you want CC breeding? Ladder stocking them is a common method of controlling populations. Breeding beds will promote a self sustaining pond, but could get out of hand. This is difficult to access, I know...just food for thought.
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I am going to have them connected together loosely with lines and with a line tied off onshore. I will be able to removed the breeding tubes if necessary.
3.) Shop compressors are not efficient in pond aeration. It is hard on the compressor, cost more to operate, and may lead to oil sheens in the pond. Oil will get carried in the air stream if it is not an oil free compressor.
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I was thinking about using an old shop compressor, but I may have to go a different route.
I may take the suggestion and post this question in the Aeration forum as well.
Thanks everyone for comments so far.