Originally Posted by MrBishop
Water params for ammonia, nitrite, nitrate, pH? (these should be taken before a water change to obtain an accurate reading)
Just over 7 i would say.
I'm not understanding this answer, I'm sorry. I am assuming the pH is just over 7? I really do need to know readings for each test, exact numbers. There is no other way to determine if environment has anything to do with the problem... those numbers are very important.
I also have to agree with Molly, not just because of the points made about incompatibility, but the environment needed for these fish is very different for African cichlids vs SA cichlids. There is also the problem that all of these fish together will get far too big for a 65 gallon tank.
If you decide to rehome /separate them, please know that the convict cichlid cannot stay with the parrots either. The convict is going to be much more aggressive than the parrots, and have much better swimming ability. If kept together long term, I would expect the convict to rip apart the parrot cichlids. 1 convict can do a lot of damage in a very short time. As the convict matures the aggression level will grow with it.
It is also possible that water quality has something to do with the slower growth, as well as the bullying that was already mentioned. Aside from nitrate levels that at this point we don't know anything about, if pH is only just over 7.0, that is a bit low for the African cichlids. African cichlids thrive in harder water with a pH of 8.0 - 8.2. The 7.0+ is more suited for the SA cichlids.
I'm wondering how long it takes for the fish in your tank to completely finish the food you give them and if everyone is getting sufficient nutrition? Tropical flake food is ok for part of their diet, but most of the fish in your tank should have other variety to achieve good nutrition. There are a wide variety of foods to choose from that can be alternated with the flakes. Live black worms, brine shrimp (frozen or live), cichlid pellets (2 different types of pellets would be needed as African cichlids are heavy vegetarians but SA cichlids tend to be omnivore but needing a much more high protein diet.
I hope all of this info is helpful to you. If you post your water params for ammonia, nitrite, and nitrate... then we can sort out if there are water quality issues contributing to your problem as well. If there isn't a water quality problem now, there is sure to be as these fish begin to grow.