Review on Optimized Pawfly Nano Bio Sponge Filter Kit for Quiet Fry Betta Shrimp Foam Filtration in Small Fish Tanks up to 3 Gallon Size, including Airline Tubing by Morgan Ostwalt

Yes, it needs an air pump. Get a rating for a tank of 3 gallons or less and you're done. No, there are no instructions, but follow the picture in the box to make sure everything is connected and ready. The straight-through valve is adjustable for higher or lower bubble delivery and is a little fiddly to get in the right position, but works well once adjusted a little. This is happening in my pico aquarium which will eventually have shrimp.