John's explanation is pretty straightforward. I prefer five gallon tanks, so I can maintain water quality easier. At any rate, it is considered a bad idea by many, because they think brood care is a learned behavior. I have gone three generations pulling eggs, and thensuddenly end up with a model mom. I'm convinced that failure to brood care is a response to environmental issues. The water parameters for broodcare are much stricter than the parameters for spawning. If you want to be sure you have a next generation, then pull a spawn. After that start experimenting with softer water, lower pHs and stuff like that until you get the correct response. The presense of lots of small live things in the tank seem to be a positive influence. ------------------------------------------------------------------------- This is the apistogramma mailing list, apisto@listbox.com. For instructions on how to subscribe or unsubscribe or get help, email apisto-request@listbox.com. Search http://altavista.digital.com for "Apistogramma Mailing List Archives"!