Multiple Radial Flow Filters or large cone-bottom tank?

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I'm part of a senior capstone design team building a fish farming prototype. It's going to be a custom built 1600 gallon tank with a 1x turnover rate (1600 GPH). I've been researching how to design the water recirculation system for weeks now in aquarium forums until I discovered aquaponics and have been flooded with a wealth of invaluable information. While were not utilizing this system to grow plants (since it is a saltwater application), the methods in disposing of TSS is identical. Onto the question:

(I know it sounds crazy, but...) The design of the tank we are utilizing allows us to house a large amount of shrimp per square meter, so we plan on feeding an average of 8 lb's of fish food a day. This is going to create a large amount of fish waste, and we intend to use a radial flow filter like in this video to handle the largest settleable solids. My concern is that the typical diy design with a 55 gallon plastic drum isn't going to cut it for out application since we don't want to be out there everyday emptying the solids. Therefore, can we resort to use multiple 55 gallon drums or maybe order a larger tank from this website. I figure an 80 gallon tank might make more sense for our application. 


Let me know what you guys think, and thank you!

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Hi fm7777

Welcome to APN/HQ

I would stick to the blue drums (price), If you look in the comments (scroll down) in this link http://web.archive.org/web/20130825130637/http://www.earthangroup.com.au:80/diy-solids-filter/

you will get a flow capacity figure on the blue drum.

You should also look in to multiple outlets of the fish(shrimp) tank, bottom drain/midwater pickup/surface skimmer.

Use the RFF primarily on the bottom drain with aprox 20% of the total flow (increase at feeding time).

Also remember until the filter is drained of solids, it represents a potential bio foul hazard, with the solids standing in the water column.

IMO you should drain out the filter(s) as daily routine in any high density setup. 

If that is a practical problem, maybe look in to rotary drum filter or parabolic screen filter, where the solids are automatically  taken directly out of the water column, as it passes thru. 

There are multiple threads on diy versions of all the filters on the forum, also koiphen forum has a great diy section http://www.koiphen.com/forums/forumdisplay.php?294-Pond-Construction-amp-Filtration&s=d9d545355e5a5d839cf027e52c19bde7



Edited by ande (see edit history)

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