Pressurized percolating filter of the type used for the regeneration of water in aquariums

A pressurized percolating filter for regenerating water in an aquarium comprising:

• a closed receptacle having a top, a bottom and side walls;
• an intermediate wall having a plurality of main holes;
• a prefiltering chamber defined by said intermediate wall and by said top of the closed receptacle;
• an intermediate chamber defined under said intermediate wall;
• a percolation chamber defined under and communicating with said intermediate chamber, said percolation chamber being filled with percolating material for settling bacterial colonies capable of regenerating said water;
• a collection chamber defined between said percolation chamber and said bottom of the closed receptacle;
• a main pipe engaged to the closed receptacle and feeding a mixture of air and water to be regenerated into said prefiltering chamber;
• a pump engaged to the feeding pipe for pressurizing the closed receptacle;
• a feed pipe connecting the collection chamber with said aquarium;
• said intermediate wall having a lowered portion which defines a tub provided with calibrated holes which number less than a number of said main holes;
• and
• a float valve for opening and closing an inflow opening of said closed receptacle, said float valve being operated by water to be regenerated that is present in said tub, said inflow opening being closed by said float valve when the pump is working.