yes allready tryed that funny you say that see got pissed cause I grabed a new pare .... I'm running hang on whisper's(30/20) and an internal 15gal(make uknow bought at tag sale ) that I have customised . useing media in them ceramic ring's / filter pad's ,and seachem hyper sorb mixed with reinew 4L as well as two medium size bag's of clam shell's hanging in the aquarium(20gal long) it has worked beutiful so fare . and I will try leaving the light on but for the most part the tank's are in a room of my house were they get a natural light cycle from the sun but I still have light's on the aquarium and hope by doing this it will not stress the fish?? my tsn is in the same tank but is divded (70/30 slit) from the jaguar & convict.... thanx's managuense 6'' convict 2.5'' tsn 6'' no other fish in tank ..guppy said:Are there any other fish in the tank? Corys and plecos can clean out a nest very quickly. What type filter are you using, for most hang ons and canisters wrapping the intake in a piece of pantyhose will work, (it works best if you remove your girlfriend from them BEFORE placing in the tank).