I kinda remember using cotton wool or cotton balls in a corner box filter many, many moons ago. If I remember correctly, it packs down and becomes useless very quickly. As for sponges, if they are free from impurities and porous, they should work. I have used plastic scourers for coarse mechanical f...

Howdy! I have a featherfin also, a male. He's about ten years old and eats from my hand. He's not above giving me a nip if the food isn't there either! He is soft to the touch, and has never drawn blood (unlike the male convict I have). If I just add floating pellets he swims upside down to eat them...

Just wanted to introduce myself. My name is Bob, I'm 51 years old and have been keeping fish since I was 11. Presently I have one 75 gallon freshwater tank for two firemouths, one male convict, a male Jack Dempsey, a male OB Peacock, an unidentified male Peacock (both Aulonacara), a female Firehead ...