Backyard Aquaponics
A place to discuss aquaponics

Actually, mine was one that came off my brother's pool, and was free. It took about 10 minutes to unscrew to bolts and remove the top, dump the sand out and rinse it out. ll the flow characteristics, and backflush valves are built in, so i would suspect it would work better then a tube of pvc.

Some additional mods -

http://www.koiphen.com/forums/showthread.php?63850-DIY-amp-MODs-%28do-it-yourself-make-your-own%29-3rd-edition

How is your Dissolved Oxygen just ahead of where you will be placing this filter? These are often not aerated so the only nitrification happening is dependent on the oxygen already contained in the water going in. I guess what I'm saying is without adequate oxygen levels you'll be building a solids filter only.

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Not too hard including an Air-Stone to the canister, Just to be sure there is PLENTY of air..



I would like to try this stuff..
Looks like the surface area should be pretty good.. claimed to be .. 3500 m2/m3

I am using a cartridge filter on my new system to completely polish the water going to the Bio-Ball/Media filter, so that there are NO solids to clog the media..

The cartridge filter works great, and better than with my OLDer system, , as when I changed from "Timed-Flood-n-Drain" to Auto-Siphon, the clogging process meant that the flow rates slowed and this completely stopped the Auto-Siphons from working..
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It would be around 7 Scotty. I was hoping to have a kind of hybrid...both physical and nitrifying. I'd like to keep the water a bit cleaner as well as keep the nitrites down below .25. I could also do a large Baki type with one of my juvi IBC's. But that would require a lot more plumbing and $$. This would be just a few fittings and the media. I'm still going to replace the homemade mbbr with some of the "real" media. IF I can ever get the guy from the company to call me back. I'm almost ready to start a RAS/Aquaculture supply business. I've lost count of how many companies either don't ever return a call/email, or who take days/weeks to respond. I guess in their businesses, that's acceptable. I run service businesses, and if I ran my businesses like that, I would starve.

They claim to be able to do both and I think it will probably work as a hybrid as long as the retention time is low. I think BuiDoi is right about adding air but I'm not certain exactly how you'd go about adding air to a pressurized filter and you may not need to. I think I'd run it without at first and see how it does. BuiDoi may have already added air to his and could tell you how he did this on his filter if you do need it.

Have you looked at flow direction through the filter? I'm thinking It probably needs to be reversed for any kind of floating media.

Yes, that's what that one link you sent said...reverse the flow. Just changing the placement of the tubes.

Hey guys, old thread, but I just got a sand filter for free, I've got most of the sand out (what I could shovel and dump out) it needs rinsed and all, but... I'm looking at using this as a biomedia fines filter? I looked at the links above and such, but I'm still not sure what I should put in it, I'm looking more cheap and lightweight (I'd like to be able to move it on my own, unlike full of sand needs three guys haha). I pulled what looks like twenty gallons of sand out (2/3 of a 33 gal bucket) and I'm thinking it's gonna go after a prefilter and a series of dutch buckets, as a final scrub before the water goes into my ft. Any ideas?

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