Michael, I am in a slightly similar situation as yourself. M. Altispinosa are very prolific breeders and I have two breeding pairs in my 7'x2x'2' community tank (180 imperial gallons.) What I have to do is remove some of their fry when they are free swimming on day 2 or 3, after that they are gobbled up by the other tankmates. I have found them to be a very adaptable species as far as water parameters are concerned. I think as long as the pH does not go higher than pH7 they will be okay. You could add some pieces of bogwood into this tank or even filter through peat. You mention perhaps moving both your pairs into a 10 gallon tank - I think you should move one pair only to this small tank. Community tanks are lovely but if it is your intention to successfully breed and rear young, "species" tanks are a must and of course you require rearing tanks. Helen Scotland. >The question: My M. altispinosa have been in a 29G crowded community tank since I first got them about 2 months ago. I have two pairs and they insist on fairly continuously breeding. Unfortunately, in the community tank the free-swimming fry don't last very long due to predation. I've been wanting to move them out into a 10G for some time now but have been struggling to get the pH down in that tank to the 6.3-6.4 that they are currently in (CO2 injection). The 10G is currently at about 7.0. Can they take this pH? I'm hoping to find some time to work on getting the pH down again (a long story!) but don't know if I'll get to it soon enough. Also, could the parents be moved with the fry or should I just move the fry? > >Michael >FUNdaMENTALs, science and creativity store >http://fun-da-mentals.com ------------------------------------------------------------------------- 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"!