Dark Jester;4583103; said:
Nice, I'm definately getting or building one in the next week or two.
EXCEEDINGLY easy to build.
One section of 1/2" PVC (came in 5ft lengths for like 1$)
One T connector 1/2"-3/4" (3/4" on the side of course...1/2" straight through)
One of the small filter media bags you can buy at petsmart. Much like a small filter sock with a drawstring, fits just about perfectly over the 3/4" side of the T.
Cut the PVC to a length you desire...you want the T connector to always be submerged, but not right at the bottom (all the crap will flow straight past it and out the end of the tube).
Drill a hole at the bottom & top, about an inch down on each end. Shove your airline tubing into the bottom hole and bend it back towards the top of the tube so air is blowing back towards the surface. Run the airline from there out the top end of the tube.
I like to cut the tubing an inch or so out of the top and put a valve on it (the type you can screw shut & adjust the airflow). This way I can leave a long hose attached to my airpump, leave that valve on the long hose and close it off when not in use and then hook it up and open the valve when I want to use it.
Another thing I did was get a huge piece of surgical tube (1-1/2" or 2" i think) and cut a ~4" section, it fits real snug over the 3/4" of the T and the bag fits tightly around it, made it easier to deal with the bag (no more figuring out how to tie it & untie from the PVC every time I want to use it)
Overall it works pretty well. Sometimes it can be a pain to get larger pieces into the bag (they seem to either go past it or not go far enough and just fall back out when you pull it out of the water) but I'm still thinking of how to perfect it.
My idea with the surgical tubing was to drill tiny holes in it (using a thumbtack to poke holes didn't work, nor did a small nail) so that water can escape but debris would not. And I have a PVC end cap that slides over the end of the surgical tube. This way I could just use the vac, all the crud collects in the end cap, pull the endcap off and rinse it out. No more nasty bag to deal with
