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Published on Mar 30, 2010
list of materials:
one container with tight fitting lid, screw on type(NO METAL) one powerhead, any size, as long as it has a filter fitting on the end enough media to fill container almost to top, leave at least 1 inch of space after top mesh filter material one small section of filter mat material(fine or coarse, depending on desired removal of particulate) drill with 1/4" , and 3/4" hole bits.(or depending on powerhead size, bit may need to be bigger or smaller.)
1. drill small 1/4" holes in bottom of container, one higher than the other, EVENLY across the bottom of container, do not go any higher than 2" from bottom of container. 2. drill bigger 3/4" hole in lid.(depending on powerhead inlet size, hole may be bigger or smaller.) 3. rinse out container and lid, get rough edges off with razor or knife. 4. fill container with desired media(i use expanded clay hydroponic grow media) 5. insert filter mat in top, making sure no media can get to the inlet for the powerhead. 6. press inlet for powerhead into the top, should be very tight fitting. 7. screw on lid and insert powerhead in inlet piece. 8. be sure its all tight, and drop into tank. 9. plug in and leave it alone. 10. water should be noticably clearer in less than a day.
maintenence: remove the filter from the tank. allow the water to run out the bottom. remove the filter mat from top, rinse till water runs clear. depending on fish waste load, it may need to have the rocks rinsed out a bit. replace filter mat, and drop back in the tank.
thats it, easy to maintain, easy and cheap to build.