Quote:
Originally posted by WetSleeves
A question about the cystern. I presume that there is very minimal flow in there. As such it will tend to be a detritus trap. Do you have any plans to vacuum out the bottom during water changes with any regularity?
EDIT - I don't recall if you said there was a prefilter before the cystern. If so that would greatly reduce any POM that would potentially make it into the cystern.
I don't mean to bash the idea. I think you did an awsome job planning the system but like any system there will be minor flaws. Even the ocean ins a work in progress. 
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I had two nylon filter socks before the cistern I have 5 of these that I rotate some are 100micron and some are 200 I believe.
Aquatic ecosystems sells them and they are a very nice large size.
One filters the water that enters the stock tank and then that water goes to the cistern and passes through the second filter sock.
Recently I took off the second sock because it never had much of anything in it. The first one does the job pretty well.