mike dunagan;1034900; said:
That is what I forgot... PH is not really an issue unless they are wild caught or your LFS has high PH... and most likely they are evil and use RO for africans or it is the same as the tap water you will be using most likely...
If that is the case... how could PH really matter... I think PH is a trick to sell more stuff at the store...
I would have to disagree. pH is not an issue with most fish as they are highly adaptable to a wide range of parameters, depending on the fish and where it came from. Wild fish tend to be less adaptable, compared to fish that have been captive bred.
pH and especially the different types of hardness is an issue with African Cichlids, however. Even if Captive Bred, having a low amount of dissolved solids in the tank will put a strain on the osmoregulation system of a fish. The crushed coral in your Fx5 could give you the appearance that your pH is very high, and your water is very hard.. However, this might not be the right combination of dissolved solids for your fish to osmoregulate comfortably.
There are 3 different types of hardness.. However I am no expert in this field. I just understand that you can add buffers to give your water the appearance of having a high pH and hard water, with it actually being very depleted in the appropriate dissolved solids. Chemical additives like 'RO Right' and 'Rift Lake Buffer' will help immensely if this is your problem.. Along with aquarium salt.
From personal experience, many fish can live outside their desired pH range.. but in every instance in which an African cichlid (thousands of year of wild generations derived from very hard water) is taken from this hard water, or depleted of dissolved solids, it suffers and dies 'mysteriously' quite quickly..
Referring to my previous post about the Brichardi's and the driftwood, I see alot of customers fail to inform me they are on well water.. and although their pH tests in the range of 7.8+, which should be great for Africans, the africans die over and over. Only adding a rift lake specific buffer solved the issue.
Hope that helps..
(I would still point fingers at aggression first though.. do you re-arrange decor upon addition and/or add multiples of 3+ in order to spread out aggression? Adding a single fish in a tank full of established africans with-out making them re-establish their territory through scenery change could be your problem too.)