Teacherman Posted April 16, 2008 Report Share Posted April 16, 2008 Hi all, Someone had instruction s for making an external canister-type filter out of pvc pipe. One end was glued on, the other a screw off, with poly fittings to and from the tank. Powered by a power filter in tank, and returning to tank. Where has it gone? I was gonna make 2 this week! There was photos of it in action on a 3 foot tank, and the person who made it had the bits donated. Adam Link to comment Share on other sites More sharing options...
WhoWeR Posted April 16, 2008 Report Share Posted April 16, 2008 This one: http://qldaf.com/modules.php?name=Forum ... pic&t=1561 It was in the article section Jenny Link to comment Share on other sites More sharing options...
wolften Posted April 16, 2008 Report Share Posted April 16, 2008 ...or this one... wolften Link to comment Share on other sites More sharing options...
Rusty Posted April 16, 2008 Report Share Posted April 16, 2008 Wow wolften that's a neat setup. How do u get the foam and stuff out to access pump/bioballs? Cheers, Rusty Link to comment Share on other sites More sharing options...
wolften Posted April 16, 2008 Report Share Posted April 16, 2008 ...just use screw on caps to access all media and pump. I have not made one but have seen one in action, and you can make them as big as you want. Link to comment Share on other sites More sharing options...
Teacherman Posted April 16, 2008 Author Report Share Posted April 16, 2008 Thanks Jenny- that was the one. Thanks wolften too- I'll nick a couple of your ideas too. Link to comment Share on other sites More sharing options...
Peter Posted April 16, 2008 Report Share Posted April 16, 2008 Adam Have your students make some up as a 'rich task', authentic pedagogy activity thingymebob and sell them on the forum. Just an idea. Peter Link to comment Share on other sites More sharing options...
savage_roo Posted April 16, 2008 Report Share Posted April 16, 2008 Adam Give Jimboozed a yell he was the 1 that posted the 1 U ar thinking about Roo Link to comment Share on other sites More sharing options...
Doug Posted April 17, 2008 Report Share Posted April 17, 2008 I made a PVC filter based ont he design I found on this forum. It isn't very big, but I use it to filter my pond (a big one too!) and it works a treat ! The water is always crystal clear...kudos for the designer ! Link to comment Share on other sites More sharing options...
Teacherman Posted April 18, 2008 Author Report Share Posted April 18, 2008 The jimbozed one is the one. I used rubber grommets and normal 13 mm poly pipe for irrigation joiners to go through the 100mm drainpipe. The grommets were from a hydroponics store in D-Bay. Estimated costings: 100mm PVC pipe, free end cap - just under 5 bucks threaded end cap- just over 5 bucks lid bit for the threaded end cap, around 5 bucks primer for joining pvc (potable, so you can drink it) free (school had it) the contact adhesive stuff that melts pvc together- the pressure handling one (green, not blue) 5.70. grommets 60 c each 13 mm retic joiners/ elbows around 50 c So I have all the stuff for 2 "canister" style filters for under 40 bucks. BEAT THAT!!!!!!! I am contemplating putting bioballs at the bottom, topped with ceramic noodles, topped with fine filter wool, then a bag of carbon on top. I will use the same for my marine tabk (when I get it going) but with coral rubble in place of noodles. Whaddyareckon? Link to comment Share on other sites More sharing options...
wolften Posted April 18, 2008 Report Share Posted April 18, 2008 ...instead of bio balls which needs to have water passing over it, in other words, not fully submersed, use coral rubble coral bones, buffers the water too, for Africans. 20kg for 45 bux. wolften Link to comment Share on other sites More sharing options...
Teacherman Posted April 18, 2008 Author Report Share Posted April 18, 2008 ok. Was thinking of that. Perhaps put some sponge at the bottom? mostly to stop inlet clogging up- it will be hard to get to once established. Where for those prices on rubble? Link to comment Share on other sites More sharing options...
Peter Posted April 18, 2008 Report Share Posted April 18, 2008 http://www.qldaf.com/modules.php?name=F ... pic&t=5279 You could pm ' littlefish ' to see if he can help as well. Peter Link to comment Share on other sites More sharing options...
Teacherman Posted April 23, 2008 Author Report Share Posted April 23, 2008 Ok, all built (well nearly). Do i have to wait until the solvent smell goes away before use, or will this not contaminate the water? It's been 48 hours.... Link to comment Share on other sites More sharing options...
jimbozed Posted April 23, 2008 Report Share Posted April 23, 2008 ive always left mine for a day then rinse really well havent had a problem yet. Link to comment Share on other sites More sharing options...
Grumundi Posted April 24, 2008 Report Share Posted April 24, 2008 Wonder how they would go with a highpowered reverse flush to clean em out? Link to comment Share on other sites More sharing options...
Teacherman Posted April 24, 2008 Author Report Share Posted April 24, 2008 OH NO!!!! It leaks from the threaded lid part. It has an O ring in the lid, but still leaks under pressure. Perhaps the 1200 litre pump is too much? Any advice???? Link to comment Share on other sites More sharing options...
Wetpetz Posted April 24, 2008 Report Share Posted April 24, 2008 Thicker, softer o-ring? Thread tape? Link to comment Share on other sites More sharing options...
gtr73 Posted April 24, 2008 Report Share Posted April 24, 2008 ok. Was thinking of that. Perhaps put some sponge at the bottom? mostly to stop inlet clogging up- it will be hard to get to once established.Where for those prices on rubble? One layer of bioballs at the bottom will stop the inlet clogging up, as per your first idea. :wink: And I'm thinking thread tape for the leak. Link to comment Share on other sites More sharing options...
jimbozed Posted April 25, 2008 Report Share Posted April 25, 2008 OH NO!!!!It leaks from the threaded lid part. It has an O ring in the lid, but still leaks under pressure. Perhaps the 1200 litre pump is too much? Any advice???? i found this a few times get some fine sandpaper and clean the top of the screw connector so its smooth also put a little cookin oil on the o-ring and thread before you tighten it down see how ya go Link to comment Share on other sites More sharing options...
Teacherman Posted May 6, 2008 Author Report Share Posted May 6, 2008 thread tape helps, but still leaks, albeit much more slowly. Might have to resort to sandpaper and or oil. I thought that oil was bad for rubber- causes it to deteriorate? Well at least that's what it says on condom instructions.... Link to comment Share on other sites More sharing options...
cripple04 Posted May 7, 2008 Report Share Posted May 7, 2008 condoms are latex mate the rubber on the oring is made from ppe or some other plastic, how do you think they do it on orings on oil filters mate oils is fine for them Link to comment Share on other sites More sharing options...
Teacherman Posted May 7, 2008 Author Report Share Posted May 7, 2008 Ah-ha! So far its working OK with a shitload of plumbers tape- Like most of a roll. 4 hours and going strong... Adam Link to comment Share on other sites More sharing options...
gtr73 Posted May 7, 2008 Report Share Posted May 7, 2008 That's good to hear but Geez mate, a roll of plumbers tape every time you go to clean it??? Is it feasible to review the o-ring with a different one? Surely an ideally sized and well-fitting o-ring wouldn't let any water through? I'm not sure on the fluid dynamics but three of my canister filters drip water if I turn them upside down. If placed correct way up there's no leaks at all. Obviously they're designed for the purpose I guess but I can't think why yours needs a roll of tape to seal it other than an ill fitting o-ring. Any chance you can take a photo if it (God forbid) leaks again? Link to comment Share on other sites More sharing options...
Teacherman Posted May 7, 2008 Author Report Share Posted May 7, 2008 $2 for 2 rolls from crazy clarks- Thats 2 cleans each (for 2 filters) once every six months or so... I think the school budget can stretch that far. I'm a bit embarrassed to take a photo- you should see the red primer and green crap all over the outside of the pipe! I guess thats what happens when you let year 11's do a job for you... Adam Link to comment Share on other sites More sharing options...