9. It is made from a square sponge, air stone, tubing, and pipe. Take apart the sponge filter and remove the plastic strainer from the inside of the foam. If you take the sponge apart on the inside at the opposite side from where you attach the air line from the pump there's a place to connect an air line. If your tube is wide enough, add an airstone. Connect the air stone to the nipple or center of the bullseye using a small length of airline tubing. And there you have it – a perfectly acceptable five minute simple sponge filter for a hospital/quarantine tank. 2 years ago. Remove the bullseye from the top of the strainer, and put the air stone at the bottom of the strainer. DIY sponge filter for bettas. Press the plastic grate back into place. Airstone inside pipe. Cut your sponge to make it roughly cylindrical. Cut a piece about an inch long and connect it there and connect an air stone to the other end. By attaching a sponge to the intake of a breeder box, you’ve already created a sponge filter. Attach the airstone, so it is inside the filter body, dangling at the bottom. Drop-in your air stone and plug the air pump and beautifully your filter starts working. You can take an air driven breeder box and turn it into a customized HOB filter that also acts a quarantine / breeder box. Ok, put the sponge back in, into the lower part (make sure the airstone is dangling as low as possible, you want air flowing all the way up). Fit the pipe and tubing to it and make sure they are both below the water level. By this Simple Process Good Bacteria Grow in the Sponge and Helps to Convert the Fish Waste which passes through the sponge. Here's how it's made: You'll need a filter sponge/floss, bio media, about a foot of airline tubing, a single hose connector, an air stone, and about 10 inches of 1-inch PVC pipe. The airstone is used along with 3/4” pipe for DIY sponge filters. This stops the air stone from lifting from the bottom. Get a square sponge and hang it at one corner of your aquarium. Im trying to make a sponge filter, i have the air pump, airline and air stone. It should fit snug inside the pipe and NOT fall out, but also be removable (for cleaning). ... Insert the air stone all the way down to the sponge. Near the top of the other end of PVC drill a whole and thread the airline tubing through this hole. Hack # 4: Breeder Box Filter. Connect to an air pump. Reassemble the sponge filter and connect it to your pump, place in tank, and you're ready to go. Take some charcoal (and zeolite) and fill up the top part, but don't overfill. I tried to make one today but the flat part of the airstone was showing and the stream of bubbles was really strong, way to strong for my betta. The idea is that the air bubbling upwards through the filter will draw in water from each side, and funnel it upwards, like a normal sponge filter.But I know a lot of the efficiency of a sponge filter comes from funneling the air upwards--the faster the rate, the more the suction.I don't believe I can do that with this design without losing surface area (which the whole point … Here is my sponge filter in action, literally five minutes after the idea popped into my head: DIY sponge filter in action. The rising bubbles will create lift and draw water through the sponge. Enjoy! Sponge Filter is a biological filter which needs an Air Pump to suck water from bottom of the filter and then passing the water through the sponge and exit through top. Click for more details. Step 1: Cut sponge. This stops the air stone and plug the air pump, place in tank, and.. Literally five minutes after the idea popped into my head: DIY sponge,... 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