![Amazon.com : AQQA Aquarium Electric Power Sponge Filter,3W/5W Silence Submersible Foam Filter,Sponges Bio Ceramic Media Balls Double Filter for Saltwater Freshwater Fish Tank (S) : Pet Supplies Amazon.com : AQQA Aquarium Electric Power Sponge Filter,3W/5W Silence Submersible Foam Filter,Sponges Bio Ceramic Media Balls Double Filter for Saltwater Freshwater Fish Tank (S) : Pet Supplies](https://m.media-amazon.com/images/I/818tmS95W-L._AC_UF1000,1000_QL80_.jpg)
Amazon.com : AQQA Aquarium Electric Power Sponge Filter,3W/5W Silence Submersible Foam Filter,Sponges Bio Ceramic Media Balls Double Filter for Saltwater Freshwater Fish Tank (S) : Pet Supplies
Would it be okay to add another filter to my fish tank? I already have a 20-40 filter on my (30 gallon) tank and I was thinking about adding another that would
![Do I need a second filter and/or heater? Is this tank suitable for two betta fish? What should I add? : r/bettafish Do I need a second filter and/or heater? Is this tank suitable for two betta fish? What should I add? : r/bettafish](https://preview.redd.it/do-i-need-a-second-filter-and-or-heater-is-this-tank-v0-sz51ggc0fd2c1.jpeg?auto=webp&s=e3e880223a581fb423d8cf19074893b6da43c14e)